Let's NOT be nice to white people because they feel discriminated against.
Let's be nice to all people of all colours and genders and sexuality who are economically oppressed.
Of course reject racism and sexism -- no compromise. Focus on wealth and income inequality. Focus on helping people get proper housing. Focus on jobs. Focus on those things that cut across race and gender. That way address their angst and fold them in.
(more or less) Those people have grown up playing with all colours. They have played on sports teams with all colours. They have served in military with all colours. They have worked with people of all colours. They know how to do those things.
When talking with people (note I'm not saying colour or gender) talk about macroeconomics (tariff taxes) and microeconomics (layoffs, paying bills). If they blurt out any bit of racism etc THEN push back and say "Shut up with the racism. We are talking about helping people get jobs {pay bills, whatever the economic topic}." If they insist on or bring up again racist views, say "Enough" and walk away.
Don't push them away unless they insist on racism and genderism.