Matthew 28:20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.Matthew 28:19, "Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit." Is there something about that sentence that you don't understand?
The teaching is to observe all what Christ spoke, which is to have belief in Christ.
That is how no man shall teach their neighbour. ( God puts all that will be in any man, no man puts anything in anyone.)
Hebrews 8:10 For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people:
11 And they shall not teach every man his neighbour, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest.