If you deliberately provoke someone, don't squeal if they retaliate in a way you don't like as you've only got YOURSELF to blame, simple as that :thup:
That's bollocks though, if they were singing about a tragedy involving us, then aye, but the songs they were singing don't compare to Munich.
If you're not happy with the response, DON'T FUCKING PROVOKE PEOPLE
So if Man Utd fans sing ANY songs about ANY other team if they deserve to hear songs about Munich in response?