They want blood. The massive bombing in the Afghan capital Wednesday did much more than kill 90 and injure 460. It angered Afghans enough to stage an anti-government protest in which several people died, and a funeral was hit Saturday by another bombing that killed six. The carnage has hobbled a Kabul peace conference set for Tuesday, with some participants citing poor security while others have already been evacuated. And President Ashraf Ghani’s move to sign death warrants for 11 Taliban prisoners — and potential bargaining chips — is sure to spark further violence.