It was his idea, but she didn't have to follow it. SHE brought them to Terok Nor, SHE didn't secure them properly... and he doesn't feel guilty at all. After all - he is Gul Dukat, a Cardassian and Cardassians don't make mistakes. And while Jarol is a Cardassian too, she is NOT Gul Dukat, is she?
Oh, "Gul A-Hole's" name wasn't planned
but if it fits, then all the better