All ethnicities must remain vigilant against multiculturalism and diversity ruining their cultural identities.
Many extremist followers of Islam retain more adherence to the Prophet Muhammed than the countries that have granted them citizenship. Particularly in the West they reject Christiano-Roman values and, if given free rein, will seek to overturn them.
The more that is given to Islamists, the more that will be taken. Eventually the Muslim vote will ensure they have political representatives that will defend and promote their values. This is already present in countries like the UK, France, Belgium, Sweden and now Germany. It represents creeping Islamisation via the ballot box.