There are lots of people in the intelligence community that are appalled by domestic surveillance efforts as well.
Besides, if your accusation is correct (that they are so mindless and stupid as a group that their reaction to a controversial presidential pardon would be to go after the political party associated with that president), then the US should just fire every single last one of them and start from scratch. Seriously. If that's where things are at, then they're all negative contributors anyway. But I don't think it's that bad, I've got more faith in humanity than you do apparently (for the time being at least :( ).