Because most of us are hypocrites. Democrats decided they liked Clinton more than they believed in sexual harassment laws and rape laws. Conservatives like Cheney more than they hate homosexuals. If a Republican acted like Clinton, democrats would string them up. If a democrat politician had a gay daughter having a child this way, people here would be screaming with outrage. It's one of life's lessons that I have learned very well. My mother in law is convinced that Rush Limbaugh's 3 wives all married him for the money and he never took drugs and everybody was lying, including I guess Rush about it. She listens 15 hours a week. If Clinton had the drug problem, she would go on for weeks and months at a time about what a scourge he is. My liberal cousin continues to harp about Newt Gingrich getting some on the side, but it was ok with Clinton. Almost everybody is a hypocrite. It's reality.
Human nature but sadly you are quite right