Anya, life is far too short. Keeping away is much better for one's sanity, truly. If people cannot discuss an issue without swearing, insulting, deriding and mocking or indeed turn to personal insults of any kind, be they based on nationality, size, or whatever- then it is a poor show and not a discussion at all. I have no problems whatsoever with anyone disagreeing with me ever- but would like to be able to gently persuade with information- without all the above ensuing, but a few won't let this happen.
So best left well alone... sad, but true.
The vast majortiy here are great and interesting and kind, in their own special way- but GN is spoilt be the few who cannot help but being unpleasant, rude and turning things personal. A pity.