I'm a white America man and have spent much time associating with white American liberals. I know what they think and why, and unfortunately, much of what they think is objectively wrong. Aside from being annoying, this causes them to support harmful policies that hurt everyone. There won't be any progress until enough minds have been changed. Below is my quick attempt at doing that.
1. Stereotypes are generally accurate, or at least, they contain some truth. That's why they exist. Yes, there are always outliers, but stereotypes are right more often than not.
2. White liberals spend a lot of time and effort trying to be morally superior, yet the world goes on as usual. What's the point of virtue signaling? Just do what you think is right and don't make a show of it. Besides, it rarely impresses anyone.
3. Whites, past and present, have done evil things. But they have done many more great things, including defeating evils such as slavery and fascism. Those soldiers who stormed the beaches of Normandy were not hippies. Most of the books, songs, and movies you like are also the product of white men. They are also the reason we have electricity, cars, airplanes, and computers. Give some credit where it's due.
4. If you think Republicans or Southerners are dumb, racist, gun-toting, religious fanatics, how do you plan on sharing a country full of them? By the way, many of them think you're naive, weak, cowardly, and amoral. Who's right? Maybe it's a little bit of both. Having blue states and red states helps keep the peace.
5. If you lock your house and car to protect it, what's wrong with locking our country with a border? Every other country does.
6. English is the international language of science, business, and aviation, among other things. It's also studied in every country. All Americans should be able to speak it and read it. The fact that many can't means the education system needs a serious overhaul.
7. Men and women are different in important and predictable ways. This was largely unquestioned until recently. No amount of ideology can overcome biology. In Poland, they say feminism ends when a refrigerator needs to be moved up 3 flights of stairs.
8. Most white people, and people in general, want the same things as you. They just have different ways of trying to get it. Tolerance means letting people pursue happiness the way they want. What could be more American than that?