Religion is arbitrary.  The way we practice it is even more arbitrary.  But it's their house, and their rules.  How many times have we seen posters at this website telling us that Reform Judaism is not real Judaism?  If you want to associate yourself with a branch of our religion which is so obsessed with excluding people, you can't expect sympathy when you find yourself excluded.  Of course same-sex partners should be invited.  But the Orthodox say a prayer thanking G-d every day that they weren't born women.  What can you expect?