I don’t think we should treat human interactions like a technical problem, where we look for edge cases and outlandish hypotheticals to probe the edges of what is possible.
If “thank you” became widely associated with bigots, and had some negative meaning, to the point where it genuinely distressed people, I’d avoid it. I think it has a widespread enough normal meaning that there’s almost no chance of that happening, but it isn’t impossible.
It's all context dependent. There can be words or symbols which are totally benign but when used in a different context do have impactful meaning. Case in point: cheese pizza.
you'd think so, but people often operate where multiple contexts could be valid.
Just as a thought experiment, if the eggplant emoji was used to denote "ok" in messaging and then people starting appropriating it for a sexual context, would you or the general public think twice about continuing to use it to mean "ok" on the off chance the other side may misinterpret the meaning?
This actually happened. 卐 was a symbol of spirituality, divinity, good luck, health, prosperity, etc. Then some bigots used it. What does 卐 mean to you today?
Someone I know from India bought a new car and put this symbol on the hood (non-permanent) as a celebration. I had to warn him to be careful. It felt bad. Then the thought ran through my head - we're in the deep south, who is really going to be that bothered about this and also doesn't know about cultural usages. Even worse.
Those that actually used them in the 20th century (like they did in Asia, not some ancient vikings or whatever) still use it.
And that symbol was 100% associated with the Nazis in the West in the 20th century. Nobody used it at the time before the war for anything else, except some tiny fringe.
If it was some mainstream symbol or idiom, merely co-adopted, we'd probably still be using it too.
If the Nazis used the cross for example,people wouldn't stop using the sign of the cross.
If the bigots start using "thank you" as some code word, should we stop saying it, lest we pollute our non-bigoted discussions?
bigots drink coffee too, maybe we should stop drinking it, because something-something...