Trolls are drama queens. They are so desperate for attention that they'll say whatever they think will get that attention. They often have a group of idiotic causes, and they'll rotate through them rather than address the absurdities in the position they first post.

They are really not interested in a discussion. They mainly want to get a rise out of someone else so that, once engaged, they can be abusive to that person. Others will be abusive without posting, but again, they're just trolling. The consistent evading of questions demonstrates this.

For politicians, those approving Putin do so to pander to anti-government constituents. That happens on the left and the right, though mostly the right. It's hard to say if they are genuinely loony or merely posturing out of cynicism. Either way, they're sociopaths and worse.