Welcoming all migrants can work in countries with no social net like US in their biggest boom. Come and work. EU countries are stretched and more and more people with low to no skills are gonna be really hard on the budgets. They cant even guarantee to pay people born there nice retirement in 30 years.
Are you under the impression that anyone can just come into an EU country and start receiving aid?
There are programs to help asylum seekers (people literally running for their lives) settle in, but there are lots of criteria to fill to be able to claim that, and it takes weeks to years of processing to validate your claims you're indeed running for your life and there's an actual risk for your life.
I understand that. But the migrants also need housing and food while they wait. I am absolutely for some kind of immigration. But not for "everybody that comes here will stay". And absolutely for trying to engage people into european society. Fundamental islam is a real thing. Second generation of immigrants is getting radicalizes and european union needs to do something with it. And if somebody accuses me on hating islam, i dont like all religions the same.