Years ago, I would have agreed with most of what you wrote. The left, like the right, reacts with emotion and absolutism. No one is above this, so I think it is very important that we frequently assess what would actually change our minds.

Given the present tide of things, however, I think there's no amount of course-correction back toward the left that would prove excessive. My opinion on this will change as soon as the tide does, and e.g. a leftist president endorses indiscriminate murder of ICE agents, or something equally egregious to what we're seeing in the opposite direction.

In a more ideological sense, though, I tend to despise the left/right continuum and think it is unhelpful for analysis.