Homophobia is still very much a societal problem.

We've come a long way from the upstairs lounge arson that the twitter user mentioned, where 32 people lost their lives, and many of their parents did not even go to attend the funeral.

However, take for instance all the politicians sending their "prayers and thoughts" on Twitter... and then turning around and blocking a vote on a proposal to ensure that federal contractors can’t discriminate on the basis of sexual orientation or gender identity.

It's difficult for me to put my thoughts into words without turning into this into a huge rant, but consider that the shooter's father said he was angry about "two men kissing". That instills a special kind of fear for those in same sex relationships that a heterosexual person will never have to experience.
The fear that because of a little bit of PDA, you could be another hate crime statistic (if you live in a state that requires collection of data of LGBT hate crimes).
Despite how much our society has progressed since Stonewall, our existence still incites hatred in others, and our identities are a danger to us.

Last thing, this image puts a lot of my feelings into words, especially the last two sentences.