Why would you say the Qatar community is very strict. You are wrong. They are probably the most understanding of the Gulf Countries. If you don't make an A*$ of yourself, there is no problem.

Just so you know, Christmas is here also, just visit a mall and see what is for sale. My Muslim friends wished us a Merry Christmas. There was a program of Christmas carrols for the expat community. There seems to be a mutal respect and acceptance of most everyone here.

WHich customs are you going to bring that are offensive, if you are going to try and convert people, yes you will have a problem.