Speaking out against bullying is important. But it is something that should be done every day, not just on one day out of the year, or just for a little bit during X month.
Bullying someone because they're gay, or because they don't have the same beliefs as you, or for any other reason, is absolutely wrong. And yes, I understand that some out there might not see showing concern for one's soul over their "immoral" "choices" in life as bullying. But even if it's done with the best intentions - you're coming across as a jerk.
"Progress is impossible without change, and those who cannot change their minds cannot change anything." --George Bernard Shaw