How do I tactfully let someone know I don't trust him?
My new boss is an overgrown juvenile delinquent: immature, irresponsible and insensitive. He is pathologically unethical, particularly where "following the rules" is concerned. In his previous managerial position, an excellent supervisor took a job halfway across the country just to get away from this jerk.
The problem is that he's totally clueless about why people don't seem to like him.
<i>[Socially inept; hmm, I wonder if he's Aspergian]</i>
Now he's trying really hard to be "nice" and "polite" around me (and I have to admit, he's stopped making devaluing jokes about everyone). He's not sophisticated enough to be manipulative and two-faced, so I have to conclude that he's really trying to be a good manager. But after years of seeing him clearly and consistently acting untrustworthy I will never be able to trust him.
How do I communicate that I will continue to do a professional job, but will never forgive or forget his past? I don't want to follow my instincts to be snarly and confrontational at his efforts to bond, but I really need to set some boundaries and give him at least a hint of why I'm uncomfortable working with him.