Khoa, can you give an example of what you are talking about?
We had a burial yesterday at the National Cemetery and two of us were appointed to do the service. We split up the jobs and I did a Scripture reading and prayers. I carefully selected the reading from my Catholic Bible which he (the Protestant guy) became visibly annoyed. He later told me that our catholic version is not good etc... I also used the Catholic Church's prayer at the gravesite (which I think is beautiful) and he said I should have prayed from the heart instead of "prayers written by some old guy". I calmly but firmly said to him: "You know, I never criticized you for your part in this service. Respect my tradition and I will respect yours! Agree to disagree if you have to but let's not go there!" When he heard that he started to say that I am being defensive blah blah and began criticizing the Catholic Church.
These people who I am working with...believe me...they come with huge baggages many of whom had changed religions several times already. They have very little respect for our supervisor. The trick for me is to pray for calmness but I will take no trash from them!