If you want to see what will happen to Europeans should they become a minority amongst Islam, you need look no further than Egypt. About 10% of the Egyptian population are Coptic/Ethnic Egyptians. The Coptic Orthodox church uses a derivative of the classic Egyptian language in their liturgy, and some of the communion rituals are based on burial rituals for Pharoahs in classic Egypt. They are the true Native Egyptians.
Egypt is considered one of the more moderate Muslim countries, and has an ostensibly secular government. That being said, if Christians want to build or repair a church, they have to get permission from the government, and even upon receiving a permit the local authorities may still tear it up and say “what permit?” So they can damage your church, and you can’t fix it without permission.
Muslims will kidnap Coptic women, marry them, and force them to convert to Islam. Not only does this whittle away at the Coptic population, but it also aids the growth of the Muslim population, and since Polygamy is allowed in Islam, no Muslim woman need go without a man. If the woman decides to run away, the law is on the side of the kidnapping man, and so are the Muslim neighbors.
Coptic Egyptians are not allowed to form their own private schools. They have to put their kids into a public school, or into a private Muslim school, but either way, their kids are made to memorize and recite Koran verses. For a Dawkins style atheist, this would be the worst possible nightmare. Also, you can get arrested in Egypt for just saying “all religion is stupid.” This is of course the BEST case scenario of what you can expect if Muslims take over. If they are truly devout Muslims you can expect ISIS.
Imagine ISIS in Europe, tearing town the Prado, the Louvre, Buckingham Palace, Roman era ruins, castles, Gothic Churches, etc. They are already tearing up all the historical buildings and churches in their homeland, they won’t blink twice at doing it to ours.
I originally wrote this entry as a comment on a video by RockingMrE: https://www.youtube.com/watch?v=JBQonH_L9eQ
My source of information here is friends I have from the Coptic community, no names will be named for obvious reasons.