When an enemy submits, they’re accepting defeat; halevai the terrorists would be beaten into submission – but that’s not what happens lemaysoh. It only strengthens them and then they get to teach people that they’re martyrs, etc..
Maybe not all the terrorists live up to suicidal jihad, but it’s what they’re taught. But not wanting to get arrested and sent to rot in hail doesn’t mean that they’d choose not to die for their terrorism.