This is exactly why dumb shit like CNN should never be considered a reliable source.
They had an article posted here several times yesterday claiming the bomber was a Syrian refugee, whereas reporting the facts would have been to report that a Syrian passport had been found near one of the bombers.
It could still turn out the guy was Syrian and went through a refugee route, mind you, but this is an unknown quantity right now.
He could also have come in with the refugee crisis posing as a Syrian. But the general attitude of the population will not change much. The damage is done, IS has accomplished their goal of spreading fear and mistrust.