So? Even if he had a reason for what he did, that doesn't mean the person he lied to has to trust him or have anything to do with him afterwards. He made his choice, he picked his loyalties. Fine. Let him have them. But he can have the consequences too.

If you hide from me the fact that my parents were murdered, that they were murdered by someone you know, I don't give a fuck what your reasons are, what the extenuating circumstances are. I am never speaking to you again. I am never having anything to do with you again. I am certainly never trusting you again. If that makes me a 'rigid autist', so be it.