Who can help me explain the specific meaning of' the righteous are butchers and the ungrateful are scholars'?

This means: loyal and selfless people are mostly people at the bottom of society, and they generally have little education; And those who are heartbroken or selfish are mostly educated scholars.

Legend has it that the dog Tu Xuwu wrote it. Cao Shangshu's friend must be a scholar to write such a word. This is also the anger accumulated in the heart, and it will happen. The first part refers to uncooperative hermits, and the second part refers to traitors handed down from the Qing Dynasty. One kind of rice raises hundreds of people, and a book also raises hundreds of people. Being a man has nothing to do with killing dogs and studying. Today's butchers are heroes as long as they stick to their principles and don't sell water-injected meat or expired meat. In fact, dogs are the most wronged, loyal to the Lord, and don't die a natural death. They are also taken by heroes to sacrifice to the five zang-organs temple. It hurts!

There is also a saying: because the dog killing industry is not on the table, there are many people who have fun, so there have been frequent crouching tigers since ancient times. Not only is there a folk saying that "every dog-beater is a scholar" and "every hero kills dogs, and a chivalrous woman never comes out of the dust", but Huang Zhong, a poet in the Qing Dynasty, also has a poem that "every dog-beater is a brave man". Or in Cao Xuequan's poems, there is also a saying that "killing a dog bravely and being ungrateful is a scholar".

Although it is plagiarized, I hope I can help you.