Don't (Gay) Kiss In Front of Notre Dame

For Valentine's Day, a group of Gay & Gay Supporters had meant to have a supposedly peaceful "Kiss In" - which soon turned violent and they were attacked with motorbike helmets and kicked.

For kissing?  

I really hate when people use religion to defend what is obviously pure ignorance and hated.  I'm not a religious man myself, but I just can't imagine that the true nature of Christianity (or other religions) is to teach hatred and violence.