Well, it's not a claim. Murder is something that cannot be stamped out. And no, we should not ignore it. Yes, more attempts should be made to stop them.
But they're 'a part of modern day football'. We all 'chant hate towards a rival team'. So seeing as we 'can't stamp this problem out' then why, if it's so widespread that EVERYONE does it, should we even attempt to stop it? It'd be a massive waste of time.