http://aglasem.com/theurge/?tag=who-killed-about-20-millions-of-aborigines-in-australia
I liked the answer of this Germaniun Muslim scholar when he was asked about terrorism and Islam : He said : Who started the first world war ? Muslims ? Who started the second world war ? Muslims ? Who killed about 20 millions of Aborigines in Australia ? Muslims ?? Who sent the nuclear bombs of Hiroshima and Nagasaki ? Muslims ?? Who killed more than 100 millions of Indians in North America ? Muslims ?? Who killed more than 50 millions of Indians in south America ? Muslims ?? Who took about 180 millions of African people as slaves and 88% of them died and was thrown in Atlantic ocean ? Muslims ?? No , They weren’t Muslims!!! First of all, You have to define terrorism properly… If a non-Muslim do something bad..it is crime. But if a Muslim commit same..he is terrorist… So first remove this double standard…then come to the point!!!

Slavery, nagasaki,the indian, etc etc...
All those fact are a part of history, they contributed to the society we got now, they're all belong to a period of history, with special circonstancy, different people, so you can't speak about them without the context and use them like argument in a modern debat.
modern society are now against racism slavery war etc etc, white men learn his lesson.
islam, especially in europa is a different thing, it's a problem for me.
islam use the fact that western society are now very tolerant and open minded because of their past to spread like a plague.
and because western civilisation now hates war or confrontation they prefer let islam grow.
it's a vicious circle; because if we speak about danger of islam, muslim speak about slavery colonialism hiroshima, top carrott etc etc, it's an easy way to avoid serious debat about the problem of islam.
It's like the accord of munich in 1938, nobody wanted war, so nobody moved, one year later hitler invaded poland.
Now with our modern system you can invade a country without tank and plane.
Just use a religion,and cover you with "freedom of speech, freedom of religion", make you a victim,and it's ok.