The US and the west need to worry about terrorism directed at the US and the west, and that doesn't seem reliably connected to poverty. Moot point in any event, as the US and the West can't really do much about poverty in Africa. That's a function of African governance and it needs to be addressed by Africans.
Exactly. My fears about terrorism are not your fears about terrorism. So when we talk about terrorism, we are talking about two different things.

I really don't fear that some engineering student from Bradford will blow me or my children up, but I fear that some poor, uneducated, suicidal bigot will.