If by "being a dick to them," you mean disagreeing with them, and by "rude" you mean death threats, then yes. In that case, you have it exactly right.
Death threats and shit pictures as a tool of political discussion are actually pretty rare on most parts of the internet once you get above the 13-year-old level. On some parts they are super common, but mostly those parts aren't taken super seriously on the rest of it.
My point was that they're setting up all kinds of whining about people "being a dick" to them in their own space, while feeling free to wander into other people's spaces and pollute them with whatever type of dickery they want, including approval for the killing of their enemies (both in Ukraine and on Lemmy). And that's ironic. That was my point.