As long as you don’t “correct” or act like you know better that minorities, you will be a good Ally.

Don’t say “I will help you!”, instead ask “how can i help you?”

That’s the question from which fucked up shit start to happen, but let’s take it at face value.

In that case, you can look for a segment of the minority group that aligns with your ideals (because not all of us think the same way, we’re not a collective mind) and offer them your support.

Do you encounter, say, Latinos who support Trump? Leave them alone and offer support to Latinos who are critical of Trump; We’ll know how to use your help to take actions that benefit all of us, including those who are “wrong.”