The genius mind can hold two opposing ideas at the same time. There's no right or wrong and there's no reason to criticize anyone. Focus on yourself. Your own temple. The faults you see in others might just be reflections of yourself. Anyone is free to think and believe anything as long as it allows for the whole to live in harmony with each other. Even altruists can be extremists, which is as bad as religious extremists.

The truth has many layers and its on every one of us to decide how to interpret things. It's you who gives meaning to anything and everything.

Be compassionate if you think you know better. "They don't know better". And you can try to showcase your opinion, but only if they are actually interested. Forcing anyone to think like you want them to think, is extremism. And it's non of your business anyways. If everyone would just take care of his/her own thoughts, we would all find peace and happiness.