To be clear, even if he had used entirely politically correct terms, the "racist" charge would still be there over the clearly-racist-in-intent immigration ban, supporting literal white supremacists, and dog whistling on the national stage.

Reality is that you won't suffer much at all in repercussions if you get a word slightly or somewhat wrong. Most people know to avoid using the N-word, or "chinks", or "fags", etc. You see repercussions when it's clear you also carry actual racist beliefs, or when it's clear that you're intentionally calling someone by the wrong pronoun because you're trying to take a political stand.

I've used the wrong pronoun plenty of times, and people have subtly corrected me, but nobody has batted an eyelash because I wasn't making some sort of stand. "Oh, it's 'she' now, ok, sorry." Despite only living in extremely liberal areas, I've also never been asked to use any exotic pronouns. The more I see people complaining about it, the more I think that it's a straw man.

Sure, there are examples of people being oversensitive, but oversensitive people are a fact of life. You can choose not to be around them.