It is a good point, and I've long been a proponent of this, that everyone needs to flag the excessive elements of "their side" more in the current climate.

Humans are humans. Some humans are dumb and emotion-prone. Some humans who are dumb and emotion-prone think their bad behavior is justified because they're on the side of justice/righteousness.

It's not enough, in our current climate, to look the other way because someone is on a similar team...

Reinvigorating honest, fair discussion requires everyone interact more positively.