These people attempted to do their jobs. Poorly, and failed, but presumably attempted to do their jobs or what they felt was the right course of action. Their failure meant they didn't deserve to stay in office, or perhaps imprisoned if laws had been broken. They didn't deserve to be driven to suicide.These people aided and abetted an enemy of their nation, who was responsible for the deaths of many of their countrymen and mass destruction of peoples property. Even if Grayven ran campaigns showcasing what they did and calling for consequences for their actions, that doesn't change the fact that if they didn't let a mass murdering terrorist walk free then there would be no issue.
Grayven did not threaten them or force them do do anything they killed themselves because the outcry over their actions was so massive they felt they had no other choice, if they didn't want such a backlash then they shouldn't have done something the public found so reprehensible in the first place.
Grayven drove them to suicide. He was happy about this. He wanted to do more of that. All three of these statements are based on the facts of his headspace and the events he caused as shown in the story. It's very binary if you think that's a good thing for a character to do or not.
"They shouldn't have made him drive them to suicide" is extremely...dubious logic given that you can justify any retaliation, no matter how vile, with that logic.