Why is the blame game for Jihadist terrorism?

This year, the U.N. refugee agency estimates, the number of people risking life and limb to seek sanctuary has jumped to more than 51 million — the highest figure since World War II. Most of these are from Islamic States.
Why blame Islamic Jihadist terrorist attacks on
discrimination and racism?
Why are muslim refuges flooding the west, if the west is so unwelcoming?
Is it possible that people flood to a place where  there  is  bigotry  and  prejudice against them?
Why not recognise Islamic jihadist  violence and terrorism for what it is?
Why is the play game?