" a feigning to be what one is not or to believe what one does not : behavior that contradicts what one claims to believe or feel especially : the false assumption of an appearance of virtue or religion" it sounds like a form of lying, which is intrinsically evil and always wrong. If someone knows of their hypocrisy, the wrongness of it, and willfully continues in it, it would be a mortal sin. If it lacks knowledge or will it would be venial. You can be a hypocrite in nonreligious matters. For example claiming to be a vegan but secretly and deliberately eating steaks in private, having deceived others on your moral status, and also being a hypocrite in your behavior.