Europe probably carries more collective guilt over its imperialism and brutality toward former colonies. Islam formerly occupied Spain and Portugal until they were pushed back out almost 1000 years ago. Now Islam has largely occupied Europe and the consequences are likely to be debilitating for decades if not centuries to come. Multicultural societies are prone to internal division and conflict and this makes them weaker and more vulnerable to attack from other nations. The US, Canada, and Australasia have always relied upon immigration to supply labour but allowing increasingly diverse cultural backgrounds to enter their populations is causing complex problems and undermines the unity that is required in times of international conflict. The secular west has become blind to the dangers of allowing immigration of religious groups who are inherently incompatible with fundamental western values...but the capture of western politics by bankers and corporate lobbyists has caused this short sighted and ultimately very risky policy to continue past a point where it can be easily reversed.