This is an invitation into His Kingdom which leads to eternal life, but it’s not the most inviting invitation. We can walk into a great number of churches and listen to a great number of preachers on any given Sunday, and we will be given a much more welcoming invitation into the Kingdom of God than what Jesus offers us here.
Who am I to ever make a judgement on what type of people are fit or unfit to receive the gospel and the inheritance of the Holy Spirit? With deep roots as God's chosen people, I can understand why the Jewish people wrestled a little bit with the initial inclusion of the Gentiles, but it was made clear that God will show mercy to whomever He decides to show mercy - Jew or Gentile. Therefore, we are to preach without any prejudice.
The command to share and spread the gospel is clear, but perhaps sometimes we get confused as to what specifics regarding the gospel we need to make sure we're communicating. I am grateful that Peter, here, gives us two very specific things about our Lord and His message that we must share when communicating the gospel to others.