Any person who stands for something good we should stand with them. Just like the Prophet

praised that treaty that was signed by the leaders of makkah protecting the rights of the oppressed in the pre-Islamic period, and stated that he would still have signed it even after his prophethood.
However, we need to be careful and demand that we do not get involved in anything which is haraam, i.e. television interviews, protest marches with music, etc., etc.
Another thing- there is no such thing as "homosexuality". It is called sodomy and it is an act and other acts which lead to that act which are blameworthy. "Homosexual" the word is describing a state, a preference. Sodomy describes an act.
Therefore we should not give in to calling it by this euphemism, which is used to muddle the emotions and play on the ideas of "love" etc.
Bookmarks