Europe is home of the people of that evolved out of it after the migration from Africa. It is our home, not the home of migrants.
Also, there is more to race than just skin color. With the norse, we have populations green eyes, blue eyes, the Irish have (or rather had, this phenotype is going to become dormant in our lifetime or our childrens lifetime most likely) populations with red hair and freckles. We see certain peoples from Africa with exceptional athletic ability, we see certain peoples from East Asia with exceptional mathematical ability, we see European peoples with exceptional artistic/creative ability. The end of diversity is the mixing of all these peoples. Yes, it is genocide just like it was with the ancient Egyptians.
We see it's already happening with the Irish and will happen soon with the Aryans at this rate. It's happening so quickly we have put all of these ethnicities under the umbrella of "white", which are a global minority (around 10% of the worlds population and shrinking).