Include as blatantly obvious fact.  The suggestion that a group "listed as a hate group" is estopped from criticising that listing is nicely Alice-in-Wonderland reasoning.  It is akin to saying that a group described as "Gnarphist" can not criticise a group so labelling them  we include opinions properly cited as opinions, and do not say "but that group's opinions are not allowed because they were the ones criticised by the other group first."