To jest, Monaco is 2/3 immigrants, I haven't heard many people complaining about violence.
Crimes perpetuated by people of migrant background doesn't equate to immigration being the cause of these crimes. If we accept that rhetoric, violent crimes are overwhelmingly done by men, so being a men is the cause of violence, right ?
I'd bet most of those are European immigrants, so immigrated from stable countries with good education standards. When we talk about immigrants causing problems we are talking about immigrants from low developed countries where many lacks education, like what happened in the refugee crisis.
I make the difference, as that's the same issue when you reunite a country that has long been under two different regimes. Or when you abolish slavery. Or when there's a rise in homelessness.
The other part of it is, putting the focus on refugees obscures the context of why these people are fleeing their country, and what we have to do with it. It's like discussing about the water leaking from the ceiling, without the context of where it comes from. Perhaps the upper floor getting flooded by leaking pipes merits a bit more thought, I don't know.
Are you serious? These bombings are all done by immigrants. That's the proof.