I disagree about giving Christians priority. Most of the migrants aren't fleeing war, though. Also, they are legally not asylum seekers when they enter Europe. Acording to international law, refugees must seek asylum in the nearest stable country. For Syria and Iraq that would be Jordan or Turkey. For Nigeria, Cameroon or Benin and so on. They aren't seeking asylum anymore if they are going to the UK.
He was talking about Europe in general, not just the UK. This question isn't about the UK. Also, this question is specifically about the migrants trying to get to Europe by crossing the Med from Africa, a majority of whom are from Syria and Eritrea, one of which is a a war zone and the other one of the most oppressive countries in the world.