That may be, but vanity is considered the worst of the Cardinal sins. It matures into envy, also a Cardinal sin, and then makes a bee line into leftist politics.
Do black people go around beating their chests proclaiming they are God's Athletes?
As Babe Ruth said. "It ain't braggin if it's true".
Do you watch any sports on the tube?
It's an understandable misconception that "the Chosen People" means that Jews are singled out as better or nobler than other people. I think every religion has this fundamental arrogance at its heart that its adherents have found the true way and are doing the right thing, while other people are somehow not doing the right, but Judaism doesn't even quite have that. "The Chosen People" simply means that God has made a pact with the Jews that entails special obligations, like keeping the Sabbath and observing the law. It has nothing to do with the rest of the world. Under the Jewish understanding of the world, non-Jews have a different relationship with God which is not governed by the same rules and obligations.
Even in Biblical times, Jewish history was full of God smiting the Jews for failing to observe the law. Being "chosen" is not the same as being selected for great things.
In any event, I fail to see how this is worse from Christians who are saved believing they are going to heaven while Gandhi is in Hell, or anything that other religions do. If a religion didn't promise itself as the right way, it wouldn't succeed for very long.
Also, it should go without saying that "cardinal sins" are a Catholic (or Christian?) concept.