Although I do not completely disagree with you as it is obvious by Jesus' own words that He came first to the house of Israel. There was a reason for this. God entered into covenant first with Israel and Israel alone, as a nation and people. It was through Israel that He first revealed Himself in a relational and saving way. (Though Gentiles could be brought in even then, but they were brought in through the covenant with its law and worship.)
However, this covenant with Israel was shadowing and moving towards the Covenant of Redemption by grace and through faith, that was brought to all nations and peoples by Jesus and through Him. It is only natural, in fact necessary to God's plan, that the Savior would be of Israel. The revealing of God, who He is, came first to Israel. Jesus was spoken of and prophesied in the OT. Sometimes using the same terms, such as servant, that did refer to Israel the nation. There are places in which Israel is referred to as God's servant----because that is who they are. And sometimes the Servant is prophesied as being Christ. Much of this is actually clarified in Rev. Daniel 7:21, compared to Rev 13:7 and Rev 13:1 as an example.
In Daniel We see this One like the Son of man---the very words that Jesus used to identify Himself. We see this Son of Man in Rev 14:14-16. We see Him in Ez 1:26-28 and Jesus speaking of the same thing in Matt 24:30-31; Luke 21:36. So Daniel, like Is and the other prophets, are sometimes speaking of Israel the nation and sometimes of the Savior who comes out of Israel----Jesus as the true Israel. I still say that when Jesus referred to Himself as Son of man, He was identifying Himself as the Son of Man spoken of in the OT. And the Jews of His time were probably very aware of this, which is why some became so angry.