False dichotomy, there are many responses on the spectrum between 'do nothing' and 'start a war with a nuclear power'.

(Also, what about when we act like brutes? Why do other countries tolerate us? Should they not, like, get together and push back, or something?)

"appeasing brutes like russia has a long history of not working" is a true statement that, in this context, does not do any of the work one would like a true statement to do, but it does do much of the work that one would like a statement to do if one were behaving with malice and dishonesty. It collapses the critique it's replying to into an inaccurate summary ("all of the things you said amount to 'appeasing Russia'") and uses a weighted, emotionally loaded verb to do so ("appeasing"). What this response actually says is "all of the problems that sedev pointed out are irrelevant because Russia is bad," and I am not surprised that you didn't say that out loud because when it's said directly, it's obviously wrong.

Do better.