YouTube appears scared of extremists. They claim to fear a anti-conservative bias. If by policing blatant bigotry and hate makes you anti-conservative, there may be an issue with conservatism, not your policy.
If mainstream conservatives have gotten to the point where they'd defend blatant bigotry, disrespect, and just down right hateful behavior, and we yield to them, we need a reality check. This type of behavior does not make our society any better, promote a discussion, or spread any kind of well-being.
The same behavior would not be tolerated in many of the community spaces we share: schools, churches, theaters, restaurants. Why do we allow such things online? Why do we allow women to be harassed endlessly with death rape threats on Twitter but not in person? I do not understand. To mistake poor cyber behavior as less important and less influential on our culture may be the gravest mistake we keep making.
There's a good faith, honest, and respectful way to have differing opinions and discuss important topics. But this isn't it, and it's not ambiguous. If we want a world where goodness prevails, we have to stop being scared and start making choices.