I quote:

"She might have problems only with arab expats (Egyptians, Lebanese)"

What a profoundly ignorant statement.

By that logic, if a person driving a Toyota swipes your car, you had better keep a safe distance from all Toyotas in future.

Might I also add, that anybody who feels any personal objection to Qatari people should do what is honourable and not accept, as a matter of priniciple, the generous opportunities offered by your hosts.

As the saying goes, you should not accept a meal and spit in the plate when finished.