He trusted him, so he will follow him forever regardless of what Sasuke will do and say?
So? The fact remains that by doing so, Sasuke has gained the trust of Suigetsu.
Whether or not it was a sincere act was largely irrelevant at this point.
Suigetsu trusted him. That's all the reason he needs to stay in the group.
Its not me that is stereotyping or generalizing Sasuke ( in your "burn the Kishi-haters heatens" mood you forgot to note that I was the first to point out the change between Hebi Sasuke, the one that fought Bee and the one that fought Danzou :lmao ), its the manga that confirms what I said:
And by the way Sasuke is not really a one dimensional character, his personality changes over the course of the manga depending on new revelations, events and other factors. He was genuinely caring about his comrades when he cut off Bee's Amaterasu-ed tentacle to save Karin. But in the Danzou fight, he was pushing everything aside (including his teammates) to get revenge. Now, it seems that he is going onto a journey to find answers about the past events of the village.
He changes. But you are still stuck with the "Danzou era him".
Characters in Naruto are rarely one-dimensional. People simply stereotype and generalize.