That is because, they have disagreed with Lord Allah and His Messenger; anyone who disagreed with Lord and His Messenger; then indeed, Lord is severe in punishment.
The hypocrites and their blind followers by hiding and rejecting Adichie disagreed with Lord and His Messenger. So, they have been killed. Believer should consider them as enemies as told in verse 63: 4. Believer should not perform the funeral prayer for any one of them as told in verse 9: 84, and should not also seek forgiveness for such transgressors as told in verses 9: 80 and 63: 6. The hypocrites and the Mushriks mentioned in verses 48: 6 and 98: 6 are hurrying for the arrival of Antichrist. So, they will be killed by the second coming of Jesus as explained in verse 4: 91. See explanation2: 6-7; 4: 115 and 7: 175-176.