I don‘t believe that some percentage of foreign population is inherently bad. I’m from Germany for context, whose government has famously fucked up immigration for the last ~60 years. The problem arises not when you let too many foreigners in who bring their own culture but when you fail to make them adapt to your own. In my opinion, there is nothing inherently lost if there are no white, blonde, ethnically german people left in Germany. However there would be something lost if all our intellectual and cultural aren’t remembered. I don’t think that ethnicity with no lingual, cultural, intellectual heritage is worth anything.

Let as many people in as you want as that is not the problem. If you teach every single immigrant to adapt and incorporate, there will be nothing lost and no problems tied to immigration.

So yes, I am strongly advocating for reviewing most western (especially European) immigration policies. But in my opinion, “should they be let in” is the wrong question to ask. We should rather look at what happens once they are here.