All these people and theories are probably missing the point. The root cause of these immigrations is the bloated state which gives away freebies (taxed from the current population or on credit for future generations) to anybody, regardless if they contribute or have any invention to do their part in the system. I am surprised people are not more outraged by being so much screwed, remove the free money and immigration will come back to only absorbing producers which giving value to the host country