We have no idea if that's the case.
Much more annyoing, though a few pages ago,
@tarrangar :
I think we have a fundamental misunderstanding what "humiliating the Seven" means.
Killing the corrupt or evil members of their faith as you seem to plan is not harming them, that's helping them.
Would be much better for our goal to get the corrupt or false worshippers to lynch those truly chosen by the Seven, than the other way around.
But even aside from that issue, it's propably going to include a lot of dead or defecting Septons, burning Septs and not stopping until the Seven publically admit their failures and other gods (and our) superiority, to all of their own worshippers.
This is not going to be done with a few silent killings and then the Seven sending a Cleric to Bloodraven to start negotiating peace with something resembling dignity.