I thought we were discussing asylum seekers and have mixed the terms refugee and immigrants. While immigrants may be seeking better opportunities (work and education), refugees are usually fleeing political persecution as a result of war.

From islamonline: "Although it is difficult to count the exact number of refugees, and just as difficult to count the refugees according to their religious affiliation, the best estimate available to date tell us that almost seven out of ten refugees in the world are Muslim. We can know this by looking at the "sending countries" or countries from which people are fleeing due to war."