This makes me so angry. Why do some Muslims do this?

The better question is why do we allow them to do this?

And no one grabbed him and escorted him out??

This is outright provocation, entering the church is beyond crossing limits.

Dominance

Intimidation

Let's just say if any of those Catholics went to a Mosque, the generosity would stop at the front door.

To be honest, it’s the churches fault. They’re allowing it.

Saw one lay his mat out in my city centre the other day and drop to his knees to pray right in the middle of the pavement. A lad walked up, wiped his feet on it and walked away leaving poor Mohammed screaming 😂

That is utterly disgusting