I think you can criticise antifa if you think it’s a similar group but protests against Britain first or the edl is to be completely different than turning up mob handed at a bookshop . I suppose you could , potentially , compare it to those who turned up to protest at the cereal or the winston Churchill cafe’s .
I don’t think that was particularly antifa , other than in its loosest possible sense . Like this isn’t a UKIP protest but clearly there are connections , I do think the fact that it’s a bookshop feels even more unpleasant but that’s maybe just me.