Put another few things on the list... Telegram.
I had been a telegram user for years, my friends and I used it for our fantasy football chat rooms and other group chats. A lot of us are not on Facebook, so Facebook messenger and WhatsApp were off the table, and when I was researching them I was drawn to Telegram because it promised to never have ads and it was developed by a Russian dissident, so I thought.. Hey, may as well use that platform.
And then steadily the platform has basically become the new platform for the alt-right as they've been booted off other things. We still just use it for private chat, but it's one of those thing sI just didn't want to be associated with. So we jumped to Signal, which I know also has a lot of alt-rights on it, but it seems like less than Telegram by ratio of alt-right to normal people.
A friend of mine in our group chat was like "Yeah... I've gotta give up my punisher t-shirt too... I just thought it was a cool comic and shit and now that things been taken over."
I think the 'Don't Tread on Me' flag is awesome, not that I'm really into flags but of all of the revolutionary war flags that one is pretty bad ass, and ... again, that ones done. That one had beeen taken over by libertarian idiots for a while, but now it's squarely in the tea party camp.
"Fake news" was a mantra against Trump originally IIRC, but then Trump adopted it and used it against everything and now it will be historically associated with MAGAssholes.
yeah, I forgot about that.
Fake news was a phrase used in the early 2010s especially around Pro-Russian Ukranian separatists shooting down that Malaysian airlines flight, and then it expanded into 2014, 2015, and then eventually with the Trump campaign when bot armies ran fake stories... Particularly the one about the Pope endorsing Trump, which got hundreds of millions of shares/interactions, and then when the Papacy released a press release of ... well, no, we don't actually endorse Trump at all, that got like 25 shares. Trump eventually took over the phrase to describe ... all news.