Politics is at least 90% tribal. Most people vote for who their parents voted for. Those that don’t, vote the way their peers vote. Ideology is just a post-facto rationalization to convince people they’re right for sticking with their respective tribes.

Lies and hypocrisy aren’t a bug, it’s a feature. By showing a willingness to lie and be hypocritical it’s proving one’s loyalty to the tribe. Mocking those that point out the hypocrisy further proves loyalty to the tribe.