I don't think you have to be a Jew to be offended by antisemitism and I removed about 10 posts about Israel killing Kirk yesterday. It is not practical to block all external links, they play an essential role in the discussion. We have blocked links to specific sources, though some of the worst offenders have found ways around the block. If you see a link to a very disreputable source, please report it, just as you should any other inappropriate post.