I think history teaches us just the opposite -- the safest course  of action is  usually to stand with the status quo.

I realize that the "they came for the"  adage is tied to what happened in 1930s Germany.   But given that there were people who stood against the Nazi regime, I think we see that their bravery didn't defeat  the regime,  and basically just placed themselves in equal peril.  

In any case, I'm not sure of the application here:  They came for the gays, so they're going to come for the heterosexuals?