There has never been any Puratan Sikh Sampradah, Jatha, group within the Sikh Panth that has ever legitimized homosexuality. Not even one precedence in our history. Yet the original poster is trying to use this argument that we are influenced by colonialism.
Truth of the matter is it is only now with western born Sikhs who have been brainwashed by the cultural norms of white SJWs that they are trying to impose western paradigms on the Sikh community.
Some Christians have been raising their concern too but like you said they don't want to be labeled. I think that School in Birmingham really got the Muslims out in protest because majority of the kids in that school are from Muslim families.