How easy it is to criticize leaders when they stumble.
How easy it is to say "I know he or she was not capable" after they fail.
Moses was in a weak position. We read how the mission of the spies failed and, as a result, the people of Israel will not enter into their land.
Now he is questioned? Why didn't Korach question Moses during the 10 plagues? Why didn't Korach question him when they crossed the sea or when they received the Torah?
Korach was not only rebelling against Moses; he was taking advantage of his situation. That was probably his biggest mistake.
We need to remember that leaders have a responsibility, and they deserve to be trusted but also respected.
Respecting the leaders for what they did, honoring their accomplishments, acknowledging their performance.
So when they fail, we do not forget all the good they did for us.