You really can't see any difference? Then you are just being obtuse. Yes if you tried to trespass in a religious building and be offensive, there'd be a response. In particular, they'd tell you to leave and call the police. However this was not in a Mosque, no Muslims were forced to attend. This was something people were doing on their own. However the crazies felt the need to respond.
I've heard about precisely zero cases of Jews going after pig BBQs in the US. Seems they are not very concerned about what you are doing on your own. If you don't respect their religion, oh well, so it goes.
Stephen Fry put it very well:
"It's now very common to hear people say, 'I'm rather offended by that.' As if that gives them certain rights. It's actually nothing more... than a whine. 'I find that offensive.' It has no meaning; it has no purpose; it has no reason to be respected as a phrase. 'I am offended by that.' Well, so fucking what."