You and others on here have made what is a cultural issue one specific to the Labour party and Jeremy Corbyn Primrose, so I do believe it was used as a stick to beat others with.
During the pre referendum period I used to visit and watch another forum. The racism - from the Brexit supporters, in this case, but it happens with all sorts of people for all sorts of reasons, was so bad that the forum owner put the threads in a special place that you had to sign into with your password - so they didn't offend the other members but you could still take part if you wanted to. They stopped of course because their aim was to gain power by shocking others, beat down their ability to argue by stunning them into silence.
There is a problem of anti almost any group in the world and inappropriate and "unhelpful" language is used by many. If you did a survey in your local golf club of how many started their sentences with "I am not racist but ..." I wonder if the results would have you and other marching on parliament against golf clubs and the leaders of golf clubs?