Her father who is planning to get married with a sense of discrimination against the tribe

There are many cases where wrong values are instilled by the environment you grew up in.
Father himself may have been a victim who was brainwashed in the old days.
I'll take a look at it with mercy.

I read it.
I think your ideas are really valuable.

There is still such foolish discrimination and prejudice in the world, society, and the world.

I would like you to move forward with your future life by thinking about how it is good for you to live while knowing that there are such foolish thoughts and values.

The real wisdom is as you think, so please practice living an equal life without discrimination or prejudice.

I wholeheartedly support you.

　Two people have already answered, so I'm not going to talk about their way of thinking. Let me just talk a little bit about the history of discrimination.

When I was in high school, I watched the movie “River Without a Bridge,” and understood how the organization “National Heisensha” was formed to oppose discrimination against buraku in the Taisho period. (Heisei-sha Shrine is also written in high school Japanese history, but there is no detailed description.) In the Edo period, both the shogunate and the Han dynasty placed their status under agriculture, industry, and commerce. In the Meiji period, the “Emancipation Order” was issued, and discrimination disappeared. However, there were descriptions of “warrior class” and “civilians” in family registers until before the war, and “new civilians” were written in the family registers of discriminated tribes.
Furthermore, although discrimination is different from the buraku issue, there used to be a law called the “Hokkaido Old Indigenous People Protection Law.” It seems that “old indigenous people” were listed in the family registers of people with Ainu culture. This law was repealed in 1997. It's definitely not an old story.

When I joined a university sign language club in Showa 58, my senior in the circle said, “Until recently, groups of deaf people have been fighting over civil law revisions.” I was surprised to hear that. I was in a hurry and opened the Rikuho Zensho. Until a few years ago, according to Section 11 of the Civil Code, “hearing-impaired or visually impaired persons” were quasi-prohibited birth persons (persons who received a declaration from the Family Court to the effect that they were equivalent to prohibited workers due to mental exhaustion or wasteful habits). It was regarded as”. I wasn't able to use a mortgage or take over the family business just because I had that kind of handicap. It was revised in Showa 54 due to a long-standing movement of groups of people with hearing impairment and visual impairment.

No one affirms discrimination. When it comes to what kind of efforts should be taken to eliminate discrimination, there are various realities of administration, local communities, and education. I honestly don't know what the correct answer is. I think it's difficult to derive a correct answer that everyone can agree with. But we must continue to make efforts to lead.
Her father was imprinted with biased ideas in the environment where she was born and raised. Everyone has the potential to fall into that kind of situation. Other than the buraku discrimination issue, there are many discrimination issues, and we must not clean up the past and what is over. It seems that bullying and discrimination against people infected with COVID-19 has also occurred. Let's make an effort so that we can learn the right information correctly and make the right decisions.

　It must have been very painful to be snooped by her parents. I sincerely apologize.
Well, I have experience too. It's not me, but let's say I'm a close relative. My partner's parents were very concerned about the fact that my house was a temple when we got married, and it seems that they weren't positive about getting married. So the two families met at the wedding, but surprisingly, they didn't meet at all. It seems that they started seeing their grandchildren at the end of the year.
In the first place, there is a tradition in Japan that the marriage system itself is about building relationships between families. It is also true that there is a trend of trying to improve the home by marrying someone with a superior status or social status in order to raise the rank of that house. Marriage registration is monogamous, and although it is not compulsory, surnames are also changed, and it is also true that overseas marriage and same-sex marriage procedures are difficult.
This is just my opinion. As much as many things are said about marriage from now on, I don't think it's necessary to get married or file a registration. Her father is going to be told a lot of things from now on. If that's the case, “I'm not going to get married. But I will cherish her for the rest of my life.” It makes it much more refreshing to say that.
You will inevitably end up in a fight, but please check your parents' feelings and your girlfriend's parents' feelings separately from good to bad first. Your girlfriend's feelings and your feelings may be different, so it's also important to report them in front of everyone.
Once we get married, we stay together 24 hours a day. There is 1 TV, bath, and toilet. The food I like is different. The sense of taste is different. The sense of time is also different. The way we feel stress is also different. It's different when you want to be alone. There are times when you can do activities at night and there are times when you can't. and so on. How much difference in sense of life do you acknowledge? Patience can be tolerated is the real enemy of life after marriage.
Marriage will change in the coming era.
・A consent form is required for sexual intercourse even with a married couple without the consent of the person in question. It's not a drama, but an era has come where rules must be written.
・Graduation party ⇒ graduating from marriage. The children have come of age and have reached retirement age, and somehow a milestone has been reached in the role of a married couple, so let's live a life without interfering with each other from now on.
・Life is different even if you get married. They don't like it, but they live separately from each other without interfering with each other. A shared house-like marriage.
This is happening in real life. There's a sense of incongruity. The forms of marriage are now falling apart. Please refer to that too.