It's what I reckon Europe should do. At the moment Europe's committing cultural and ethnic suicide. We should be doing qhat Trump is doing but better.
Why do you think banning Muslims will help Europe? When have there ever been simplistic solutions to complex social problems?
Many countries in Europe face the costs of an aging population - they need immigrants to pay taxes and do the jobs that need doing so that the country does not grind to a halt. That is the reality that economists, businesses and certain European leaders have had to face.
Not much you can do about ethnic changes to the population, unless you can persuade ethnically European women to become baby machines for you to create the workers and tax payers that Europe needs. But increasingly you see mixed-race relationships, so I think you can't turn the clock back.
If you are worried about cultural suicide, given you need workers and tax payers, your best bet is to promote policies that tackle criminal behaviour, preferably without the huge costs of running more prisons, and promote policies of integration into whatever the culture is in the area. That way you don't end up with crippling social and healthcare costs because of the aging population and not enough workers, but you do continue to maintain some of your cultural heritage despite the increasing need for immigrants. One problem for you is that individualism is part of the culture in Europe - each person free to express their identity and associating in groups of like-minded people so long as they are not engaging in criminal behaviour - which is why you end up with so many mosques and halal shops as the majority of Muslims peacefully go about their lives, work, pay taxes etc.
Do you want to change European culture to discourage individualism? Individualism tends to lead to innovation and entrepreneurship - new ideas to boost the economy. Do you think the majority opinion in Europe is that it is better to discourage individualism and go back to more social control and conformity?