Why not? He is a contributor to the culture that produces a disproportionate amount of successful computer scientists. If these walls were artificial, there would be no disparity.

Saying that being proud of a culture is building walls and thus bad is over-the-top PC. Just because I am proud (of something) does not mean that I don't want to share it with you if you want to give it a go.

You're acting as if "I'm proud to be Danish, 'cus look at all these great CS Danes" is the same as saying "We need to be the only nation in the world, and we want to wipe out everyone who thinks differently." Being proud is great, as long as you don't turn blind to other people's value and worth.