Spare me the self-righteousness, if "the people I was rude too were rude back to me" is something you can describe as "the most unsafe space I have ever encountered" without feeling deeply embarrassed, then you have no business trying to pontificate about what actually marginalised people endure. No amount of cope about how you're totally definitely not big mad, but your girlfriend in Canada is, will change that.

English isn't my first language but elaborate how "Russia needs our critical support" isn't a support of Russia.

So you didn't know what it meant, but you used it to insult someone anyway?

It means support from a place of criticism, in the sense of "I don't agree with them in general, but align on certain things".

Look, I'll back up a bit and try to be more sincere here. There are three points I would like you to consider. The first is that your own behaviour has not exactly been free of toxicity. The second is that we on hexbear are used to liberals coming in with naked bad faith hostility, so we've, unfortunately fallen to the habit of responding in kind. This leads into my third point; the hostility you describe sounds basically like the bog standard normal that I've experienced when trying to converse in mainstream liberal spaces; Hexbear is one of the few spaces where I'm not showered with abuse for the crime of having a political alignment outside the overton window of a country I'm not even from.