There's one way to go about it.
Discussion
Explain
It's good to know how to defend yourself but it won't fix the issue here. The immigrants were brought to create chaos. Fix the cause not the consequences.
Of course that’s a fact.
I don’t see a solution here tbh how to fix that.
First order of business is to stop the flood at all costs. The cultural clash is too extreme and it will most likely hurt both the locals and the newcomers.
Western Europe had it coming for many decades now. It's a surprise only for those who woke up yesterday. For a hundred years people have been writing about the plague of massive migrations.
It's much more easier to help people in those countries than to forcefully bring them into a new world where nobody is prepared to deal with them.