If they had come out with you, they would not have added to you except harm, they will wander to-and-fro in between you seeking sedition among you, and there would have been some among you who would have listened to them, and Lord Allah knows the wrongdoers.
If in verse 9: 43 Lord is criticizing Messenger for permitting hypocrites in abstaining from the battle, in this verse Lord is consoling Messenger saying that the hypocrites who lagged for the battle were best for the believers. The Three-Time-Knower Lord made the hypocrites seek exemption for abstaining from the battle because the presence of such wrongdoers will cause the weakling believers to decrease their belief and confidence and to increase confusion. Everything happening in the universe is already inscribed in Adhikr as explained in verses 2: 234 and 255. See explanation 2: 246; 6: 110 and 8: 31-33.