I agree, apart from the few very strict vegans and vegetarians who have researched every product to see which have alternative plant constituents.

I know plenty of vegetarians and one vegan who happily drink various brands of beer in the pub.  I doubt that the ones I know have researched every brewer to see which ones don't use isinglass from fish swim bladders to clear the beer (and some wine).  They may not even know what isinglass is.

Next a petition against Brewers? If it hasn't already happened.