Mr. Roboto,
Paul was accepted as an apostle by Peter, James and John... Jesus' closest confidants. Jesus admitted that he was sent primarily to the JEWS, the benefactors of previous agreements between God and Abraham , Moses etc. Largely, he was not received.
Paul speaks of dispensations.; Which are different ways God relates to man in different time periods. Jesus, being God himself manifest in the flesh, spoke of the current dispensation prophetically. Paul was chosen to get the new dispensation kicked off.
In a nutshell, the message to the Jews was Mt. 24: 14 (a kingdom message). This is what the Jews were waiting on and should have resonated with them. Apparently Jesus wasn't macho enough for them.
The message to the gentiles is recorded in Acts. Ch. 10 where (the resurrected) Jesus instructs Peter and the other apostles to emphasize Judgment as the message to the gentiles. All people will be personally judged AFTER they die. (Heb. 9:27) Paul spearheaded this alternate message, since the kingdom message was rejected. This easily accounts for the differences in message between Jesus and Paul.... and obviously makes no other sense otherwise:
Matt. 22:
Jesus spoke to them again by parables, saying, 2 “The kingdom of heaven is like a certain king who arranged a marriage for his son, 3 and sent out his servants to call those who were invited to the wedding, but they would not come.
4 “Again, he sent out other servants, saying, ‘Tell those who are invited: See, I have prepared my supper. My oxen and fattened calves are killed, and everything is ready. Come to the wedding banquet.’
5 “But they made light of it and went their ways, one to his farm, another to his business; 6 the rest took his servants, treated them spitefully, and killed them. 7 When the king heard about it, he was angry. He sent in his army and destroyed those murderers and burned up their city. (In 70 AD the Romans did this)
8 “Then he said to his servants, ‘The wedding is ready, but those who were invited were not worthy. 9 Go therefore to the streets, and invite to the wedding banquet as many as you find.’ 10 So those servants went out into the streets and gathered together as many as they found, both bad and good. So the wedding hall was filled with guests.
That invitation is still open to anyone who would receive it.... some 2000 years later. But, the hour is late.