Do I think the worst terrorist groups in the world have a right to transact on the Bitcoin network?

Yes.

Do I think people have a right to buy and sell heroin and fentanyl?

Yes.

Do I think people have a right to record CSAM on the public ledger that is the Blockchain?

No. No I do not.

Do I think every bitcoiner has a responsibility to act in defending the network from such abuse?

Yes. Yes I do.