3) The US have a very different superior approach to immigration than European countries.
This is the real problem here. Just copy us, lol.
I will recognize that the US are far superior on this aspect, but the European people are not Americans 
I wish it was that easy lol
Basically the US (and actually, no country in the America were never founded as the explicit "homeland of the Americans" in the same way that many European countries were founded by nationalist movements in the 19th and 20th centuries as the "homeland of the Germans", "homeland of the Czechs", "homeland of the Italians", etc.
I am not sure to what extent this historical argument applies and it is definitely not an insurmountable barrier. However I do think that all things equal, the pressure to conform or soft "civic nationalism" will always be bigger in Europe than the US.
I'm well aware of this fact (and it's for this very specific reason that I can gravitate towards lowkey American exceptionalism) but that doesn't mean Europe can't choose to change the way it approaches immigration. Clearly, immigrants in the United States integrate and assimilate much more effectively than those in Europe, even though we don't try and force cultural values on them top-down. Perhaps the government doing that and looking for every opportunity to "other" immigrant groups instead of allowing assimilation to happen from the bottom-up is what's causing your problems. You can choose to approach this differently.
