This is a typical tactic for evil people who are trying to manipulate others.

They pretend nothing is happening as they're actively doing the same thing you're accusing them of behind closed doors. If called out, they act like you're crazy and making it up. If it becomes irrefutable, they'll claim they were doing it for a virtuous reason and therefore it was justified.

It's just one lie after the other for them. All they really care about is optics... the fact that they're liars and manipulators holds no measure of guilt for them.