It is related that the tzadik, Rav Nochum of Horodna zt”l, disagreed with the ways of the Baal Shem Tov zy”a. However, when he once happened to hear people in his vicinity speaking negatively about the Besh”t, he became very upset and rebuked them. He told them the following moshol:
There once were two ministers who loved the king. They both wanted to do something to bring joy to the king and decided to make him a beautiful and glorious new crown. They hired famous craftsmen and spent a fortune to have the crown created. However, when the crown was almost finished, the two ministers got into a heated argument about where to affix one particularly beautiful and valuable stone. One minister said the stone should be on one side of the crown, while the other said it should be on the other side.
Obviously, they both had the same intention. They both wanted the stone to be in the best place, where it could add glory and beauty to the crown. They both intended to honor the king as much as they could. A simple villager overheard the argument and approached the men. He examined the crown and gave them his opinion by telling them which minister he thought was right. Both of them yelled at him, “You fool! Why are you sticking your head into matters that are beyond your ability to understand!? We both understand the value of the crown and we both recognize the greatness of the king. We just disagree about where to put this stone. But who are you to speak at all about something you can’t understand?”
Rav Nochum ended his story and told the people, “The machlokes between me and the Besh”t is a machlokes l’shem shomayim. We disagree about what is the best way to honor Hashem. Disagreements like this have occurred before – between Shaul and Dovid, between Hillel and Shammai, and others. But why would you stick your heads into matters that you have no understand of?”