I'm from a bipartisan family in a purple area in a purple/battlefield state. You can't grow up like I did without being exposed to both/all sides of the aisle, so you end up with a pretty decent idea of the follies of your own side as well as a lot of friends/colleagues/etc. that don't agree with you.

10-15 years ago, I was still 'allowed' to deviate from accepted practice/opinion, as long as I respected the hosts, and conditional/partial belonging was allowed. (e.g. I might be a dirty commie liberal, but I'm still a Christian or, on the other end, I might be a gun nut but I'm still queer so I fit in 'enough'). Now, not so much. We also used to have more defined and accepted internal fighting/it used to be accepted that sides were coalitions instead of Borgs.

Now, not so much. We talk a lot about things we can't say/do, and share tips on how not to be pilloried for saying the wrong thing. Interestingly, these discussions are happening with people across all parts of the political spectrum.

People were always somewhat suspicious of you for hanging out with the enemy, but it was accepted if you were of an intellectual or sneaky bent. Now it's not. You're in or you're out.

This is, after all, why virtue signalling is such a common tactic. It shores up reputational defense against such accusations. Unfortunately, it also commonly has the effect of further deepening the divide between the group and other parties who might otherwise be interested in the Cause, as the most valuable signalling techniques require costly actions - i.e. ones that are materially or socially damaging to the member doing said signalling. This may affirm loyalty, but often harms proselytization efforts (you cannot advance the Cause to your family if you have cut off contact with them for not already being part of the Cause, for example).