I understand the point you are making, Daniel. My family are all Roman Catholics and it is difficult when there is a wedding or funeral. When I have attended masses on occassion, I refuse to kneel or participate. We do not attend a hindu temple in order to witness to Hindu's, so you make a valid point.
I struggle with this issue. I have attended both weddings and funerals at Papist sites ( I refuse to use the word church in connection with them). I view such times of attendance as important to "reaching out and supporting" friends and loved ones.
It is not a supporting of their false religion, but hopefully a means of encouraging and supporting them from the side of truth,
LIkewise, I do not kneel or in any way participate. But alway make sure to speak with those who I am "there for" and try to impart some word of truth.
I do not, in any way view my presence there as "worship."