Does anyone deny that there is such a thing as militant Islam and jihadists.

I am not cocerned because he is black or because he is a Muslim. Hundreds of thousands of such live here and I know and work with many.

I am concerned because I strongly suspect he is a jihadist who wants to attack us.
I suspect that because there are many such and what they have in common is leaving here for Afghanistan or the Pakistan border country and few non jihadists are likely to make that journey.
As I said, not proof but strong evidence.