You silly little man! The 12 were activly engaged in taking the gospel into all the world until God started a new thing with Paul.  This was not a failure on the part of the 12. It was a falure on the part of Israel, who rejected the Father.
		
		
	 
 God never sent the unbelievers of Israel to do anything.
 Paul did not start a new thing.
Paul began doing what all of the church was doing in preaching the gospel to the nations.--
 Act 11:1  And the apostles and brethren that were in Judaea heard that the Gentiles had also received the word of God. 
Act 11:2  And when Peter was come up to Jerusalem, they that were of the circumcision contended with him, 
Act 11:3  Saying, Thou wentest in to men uncircumcised, and didst eat with them. 
Act 11:15  And as I began to speak, the Holy Ghost fell on them, as on us at the beginning. 
Act 11:16  Then remembered I the word of the Lord, how that he said, John indeed baptized with water; but ye shall be baptized with the Holy Ghost. 
Act 11:17  Forasmuch then as God gave them the like gift as he did unto us, who believed on the Lord Jesus Christ; what was I, that I could withstand God? 
Act 11:18  When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life. 
LA