Good question. And the other side of the coin is why they overtly antagonize 50% or more of the population, who may well get their merchandise elsewhere (like yours truly).
But they're not alone - many state, local, and federal politicans (and public institutions) bow to the gay mafia as well. Sickening and unnecessary, but true.
Where? Like most reasonably thrifty Americans, when I need clothing I would normally shop at places like these two stores. What’s the alternative? Gap’s lost too. It seems like it’s almost impossible to buy clothing anywhere that even remotely supports conservative values.