There's assholes everywhere, in any group, so also there's immigrant assholes. Not letting immigrants in doesn't help with the assholes problem.

And also not every non-westerner is a Muslim, and not every Muslim is religious/cares about someone drawing Muhammad.

What you're trying to say is Muslim immigrants have trouble integrating in secular European society.

But that has been a problem with immigration for years. In Australia in the 50s/60s the same thing was said about Italians and other post-war immigrants.

The first generation works hard and busts their ass to get their kids a good education and into professions and business. They also have more of the attitudes of the society they left (conservative etc).

The second and then third generation adopt their local society's attitude. This leads to inter-generational clashes.

Radical propaganda leads to radicalization to the same endpoint, whether Islamist or Christianist or (in Israel for example) Judaist, or in India, Hinduist.

That radicalization is what is causing the current lack of assimilation. It is dangerous because it is driven by having an in group and an out group. It doesn't matter which religion it is, the radicalization, the precepts (male domination, female subjugation, attacking non-cis genders, non-hetero sexuality etc) are all the same.

> The first generation works hard and busts their ass to get their kids a good education and into professions and business.

That's how it used to be back in the day, but it doesn't seem to be how it works nowadays in countries to which migrant-smugglers explicitly recruit customers based on those countries' unconditional social benefit payments.

> The second and then third generation adopt their local society's attitude.

See the above; and thus...

> This leads to inter-generational clashes.

...thus, inter-cultural clashes, rather than inter-generational.

Comparing Italians with muslim immigrants from war torn countries is far fetched. Italians are all over the world and have integrated just fine. Nobody is more European than people from countries like Italy, Austria, Germany, France.