Not everyone left of centre is a ML.

I never said that they were. It primarily seems to be MLs attacking liberals and everyone attacking MLs.

Liberals are not left wing.

Depends when and in which country you're talking about. In America at current they are an odd party that don't seem to stand for much, in the past they have been more left wing. In other countries I am not really sure as liberal isn't a well defined term like neoliberal or libertarian is. You could take it to mean socially liberal in which case it could be a left or right wing position much like a libertarian could be.