Your Himmler anecdote is ironic because his actions against Jews indicate that he would have killed the person that saved him and therefore would not have been saved.
Where is the irony regarding the Scalise situation? Are you implying that Scalise's opposition to the LGBT rights agenda indicates that he wishes the death of all LGBT persons, or even the refusal to allow them to work as police officers? Could this woman not have been a police officer if she was unable to enter a gay marriage? Otherwise, even if his views had been complied with, what would have prevented her from being there?   
Or is it the other way around and all LGBT people desire the death of those that oppose their agenda, so she should not have been expected to act to save republicans?
No, there's no irony here.