Actions speak louder than words, but imo its disingenuous to say that the PSL failing to support RATWM is because of PSL disliking those lolbertarians.
I've spoken with Rainer about this, and while I don't agree or like with everything he says, his point was that RATWM would expand the core message out to a broader populance, and that he doesn't like associating with the Lolberts and likened this to the Bolsheviks working with reactionary trade unions and groups. Obviously not the same situation, but the general message is the same.