I can’t speak to what’s happening in #Europe when it comes to specific immigration policies, although I must say that if people are being violent they should be arrested, and if they’re in the country illegally, they should be deported.

Now as you say here, the real problem is that existing law is not being enforced:

Storming borders isn’t violent because they’re walking in and we’re not defending the borders.

These countries should not need to do anything beyond enforce existing law, as I understand it.