Was Israel supposed to take God's salvation to the Gentiles?

Les explains that this was part and parcel of the Old Testament covenants: the day would come when Israel had completed the promises, and then God would turn to the Gentile world. In Isaiah 49:6, God says it is a light thing for His servant to raise up the tribes of Jacob and restore the preserved of Israel; He will also give Him for a light to the Gentiles, that He may be His salvation to the end of the earth. Les notes that Jacob was the nation as a whole, but Israel was the believing remnant. Israel was to have had the opportunity, and to a certain extent they did, because every word of this book was written by Jews, but God had even more than that for the nation. They rejected it in their unbelief, yet God's idea was to go to the Gentile world through this covenant people. God from the beginning knew the day would come when He would go to the whole Gentile world with His salvation. But when Israel was constantly rejecting it, He had to send the nation of Israel out into a dispersion, taking away their temple and their land.