The main thing that turned me against the modern left is the insistence on categorizing everyone into identity groups, and then treating their individuality as less important than the groups they represent.

For example, every argument that any person has more or less of a right to speak on a given topic because of their identity markers also implicitly states that their identity markers are more important than their individuality.

This goes as much when it's saying whites shouldn't talk about racism, as it goes when saying women should talk about sexism, or should always be believed when making sex crime accusations against men, and so on.

It's strange to me that you and I started in the same pro-individuality place and ended up, apparently, on opposite sides of the political aisle.