So I should adopt poor behavior because some other group did? There's sometimes a point to that for in person interactions with small groups but I don't see how that applies at larger scales. It becomes nothing more than an excuse for the poor behavior of your own in-group, which further exacerbates polarization for little to no benefit.
Realize that such behavior isn't going to change the mind of the opposition, and those in your group already agreed with you regardless. Then the bad behavior is a particularly harmful form of virtue signalling.