The reality is they are unable to integrate into a foreign society in which they live.
they just want to convert the society to their traditions and culture rather than adapting to the culture they live. that's the issue in everywhere. Islam isn't just a religion it's a bunch of separate units it has mainly religion, law ,philosophy, ethnic groups, culture, history, art, tradition etc.. if the Islam comes to a society means these every units come along with it. it actually a harmful situation to the host country cause it solely wipes out the current culture, tradition from the society. if someone blames or raises their hand against that situation that person is labeled as a racist that's because he/she simply refuses to bend over to Islamization. the only way to prevent this is make the country secular as much as possible and keep the religions aside from the society and the state. cause when entire society get Islamized there would be a risk of Islamic revolution just like Iranian revolution happened in 1979, or only allow the Islam as a religion and banned rest of all units including laws (Sharia) ,tradition, culture (Arabic culture, Arabic arts and Arabic language) unless there is no solution for this. everyone hates Islam cause Islam doesn't tolerate the multiculturalism and the variety of the religions. they just want to keep just one religion and throw rest of them all away.