I don't believe much of anyone. Humans are great at making up bad stories to explain the things they experience. Without the ability to review the evidence first hand, I cannot assume they have made reasonable conclusions, even if they speak their truth.

I'm cynical enough to imagine that everything is a farce meant to so heavily pollute the public discourse that the truth is impossible to discern from one of many well-intended fantasies. I prefer to work in the realm of eliminating impossibilities, rather than fixating on the belief that I know the truth.