Before buying the notion that LGBT people are a community make sure you read this by an author who identifies as G:
"But it is worth bearing these internal frictions and contradictions in mind when people talk about the LGBT community, or try to co-opt it for any political purpose. It barely exists even within each letter of its constituent parts. And each has little in common with the others. Before decriminalization of homosexuality in the 1960s things were arguably slightly different. But the L’s don’t need the G’s today, and the G’s don’t much care for the L’s and almost everybody can be united in suspicion of the B’s. And there is tremendous dispute over whether the T’s are the same thing as everybody else or an insult to them. Still nobody is any the wiser about where any or all of this comes from. And yet it remains the means by which people are willing to identify vast swathes of the population, and build one of the defining justifications and bases for the liberal society."