It's actually a bit more complicated than that. And unlike the US during the 20th century, Europe has actually had to contend with the far right abolishing democracy and committing genocide on its own population before. It is understandable that Europe doesn't want to repeat that mistake.

As for your assertion that anyone who opposes unlimited unrestricted immigration is somehow far right: you are simply wrong.

If you want to find out how wrong you are I would encourage you to try moving to Norway. Then tell me if the process feels "unrestricted".

I would suggest knowing things before you express strong opinions.