I know that was said in jest, but it highlights the ignorance that exists in regards to the whole "ism" thing (not necessarily on your part, just using this as an example).
It is possible to dislike something without being intolerant of it. I don't have a particular liking for any religion, but that doesn't mean I don't respect or tolerate the beliefs and or actions of those who do.
The last I checked, it wasn't illegal to walk down the street with a placard that says "I hate religion".....and until you cross the line into something like "I hate religion and all religious people should be shot"....i.e. intolerance....then you have nothing to fear from the law.
Songs/Chants such as those being discussed above may be in bad taste, and I would agree with that, but that doesn't make them a crime.
It's pretty much the same as some of the shouts that were coming from the other end. Butcher was getting called for all sorts and the Gazza stuff was pretty rough....again, bad taste and not welcome (IMO), but not criminal.
Best thing to do with these things is to totally ignore them and not give them any "air time", because the majority of people partaking in it are only doing so to either big themselves up to their peers and/or to get a bit of attention. Take that away and they have no reason to do it and will soon get bored.