Leftists' meanness toward those with whom they differ has no echo on the normative right.
It is almost impossible to do good without wisdom. All the good intentions in the world are likely to be worthless without wisdom. Many of the horrors of the twentieth century were supported by people with good intentions who lacked wisdom.
Wisdom: People attain wisdom in large part by remembering what happened in the past. No generation can attain wisdom without studying and remembering the past. None of those who believed in the 1960's aphorism, ‘Never trust anyone over thirty,’ became a wise person. Without wisdom, all the good intentions in the world amount to nothing. Intending to do good without having wisdom is like intending to fly an airplane with no knowledge of airplanes or the laws of aerodynamics. Good intentions without wisdom lead to either nothing or to actual evil.
Want to raise children who will be happy adults? Teach them not to whine.
The problem for the Left, however, is that the moment it stops painting the Right as vile, it has to argue the issues.
Most people who call themselves conservatives can't explain the American value system.