Conservatives of any variety have no place in this movement, in particular American conservatives. Social conservatives or even those brave souls to the Right of the insane Cultural Left who are Left on the important stuff can stay, but those people hardly even exist.
Another group of people who barely exist are Communists, anarchists and Far Left types who would be willing to tolerate the Alt Left. Communists, anarchists, etc. are certainly welcome, but most of them have an extreme hatred of what they call liberals. Well, most people in the Alt Left are liberals. So these liberal-haters are going to be spending most of their time bashing 75% of the movement. What’s the point?
I would also point out that almost 100% of Communists/anarchists/Far Left types have gone over to the Cultural Left, usually in the most extreme way possible. Far Left types are nearly all SJW’s now, and they are some of the worst SJW’s of them all. Most Communists and anarchists who showed up in Alt Left groups starting fighting us right away on all sorts of things. They generally called us fascists, racists, or Nazis within a few days and then took off. So while such folks are surely welcomed, the fact of the matter is that few if any Communists, anarchists or Far Left types will be joining the Alt Left anyway, so all this silly hand-wringing about throwing these people out of the Alt Left is just pointless. You can’t throw out people who are not in the movement in the first place.