The Posting is correct that the Jewish people have a significant role to play, part of that role was to be the people through whom the Messiah was to and is to come.
Christians have a signifcant role to play today, that is to make the Jewish people aware of their (the Jewish people's) Messiah Yeshua.
As a Jewish believer in the Messiah I urge all who call themselves Christians to learn about my people and to share the love of Messiah with us.