Civic nationalism that is almost Libertarian except closed borders to keep those without a Libertarian world view out would work very well without race based policies
If one race tends to commit more crime for genetic reasons then they would get arrested more, because they could not support a family in jail without welfare there criminal promoting genes would gradually be eliminated from society
If one race can not function without welfare as much their bad genes would be eliminated
The problem is not the lack of a race based policy but the existence of race based policies that let people of certain races off the hook becauxe of their race
If people stop letting people of certain races off the hook because of their race
Then people of those races would commit less crime per person in the long run
Also Muslims do not commit crimes in their own countries as often as in Europe because they are prosecuted for those crimes in their country but not in Europe
Too much Diversity of religion and culture is suicide because if you include Jews they will do bad things to everyone else then if they actually win they will die out when all the people they would normally enslave die out and they do not know how to support themselves
But the problem is the inclusion of thd Jewish religion and culture and not the inclusion of other races