I notice too, but the problem applies to everyone not western expats alone. While a lot of QL members are very helpful, I believe some members think the anonymity of the internet allows them to flame anyone who posts even the most innocent of questions. You only need to say "Why is......" before you get responses of "If you don't like it then go back home!"
Sometimes I dismiss it as a side effect of the heat or the absence of female companionship in some people's life, hiding under the veil on the internet, they can't resist the opportunity to take out their rage on an innocent person.