A lot of the Muslims were "imported" into Europe with the idea that they would exist as a second class pool of labor for those jobs most educated Europeans would never do. Eventually, they would be educated out of their religious notions and provide a few more dark pupils to gene pool.
But, what no one suspected was that the Muslims themselves had a plan. They would keep their cultural identity, their fierce tribal codes and would eventually rise to take over the roles of their former masters.
I think Gerst (or whatever his name is in the video above) is too vain and far too radical. But, he does point out the problem of the extinction of historic Europe. The fact that he bleaches his hair to help make the point is a bit silly; to me anyway.
Oh! And BTW - Right on JD!