According to reserachers at a Canadian university, Christmas trees lower positive feelings and self-assurance in non-Christians and the trees should be removed from public places in favour of 'multiculturalism and an inclusive society'.
Apparently (according to Dr. Wikipedia), the tree comes from a German Christian who chopped down a tree of Thor to disprove the beliefs of a tribe who worshipped the Norse god. I heard that another German once fell under a tree in the forest and, looking up through the branches, saw the stars in the sky, prompting lights on the trees.
If anything, it seems to me that Christmas trees are another example of the holiday turning into a traditional, past-time; having loose Christian roots and now becoming a symbol of the mostly secular Christmas we have today. It is sad that the closest to Christianity most trees get is a star on top of the tree.
To me it looks like another part of Christianity being taken out of our culture, adding to the removal of the name 'Christmas' at this time of year and the banning of annual nativity plays. Do Christmas trees really offend non-Christians? Surely the removal of Christmas in culture would go against the multiculturalism the Canadian researchers strive for?