"Microaggressions" refers to ways of speaking that might be minor insults. Here's an offered list of typical ones.

The author calls all of them blameworthy attacks, and many of them really are such because they reflect derogatory stereotypes. We should learn not to think about people in those ways.

However, I disagree about some entries in the list. A few of them amount to saying "I'm not a racist"; that claim may not be true (it is hard to avoid unconscious racism), but making the claim is not insulting anyone. Others of them say that "Society should not be racist"; that's not a insult, it's right.

Some people have trouble learning and remembering unusual names. It's not their fault and reflects no ill will.

A friend with an unusual ethnic background told me she has often experienced statements in the "Alien in One's Own Land" category, and the people who say them are generally either impressed or simply curious — not hostile at all.

Insulting someone must not be a crime. Freedom of speech includes the freedom to insult anyone, and not only in these indirect and minor ways. However, with a few exceptions where there is cause, it is better to try not to insult people.