Read Matthew 7:13-15-----It says that only a few people will see salvation, because so many will follow false teachers and not the Word of God.
Matthew 7:21-23---- States that not everyone who says they are Christian will be saved, but ONLY those who do the will of God. Only those who obey the Word of God will see salvation, not those who follow false teachers of man-made churches.
You have taken Romans 10 out of context the word call in Greek is "appeal to", The word name means in the Greek "by Authority". Just saying I'm a Christian, and not living the life of a Christian will save no one. You must place your life under the authority of Jesus Christ and live by the authority of the Word of God (Bible) to see Salvation. A lot of Christendom believes that Jesus Christ is their friend and not their LORD, KING, JUDGE, and Sovereign. Worldliness and The Kingdom of God do not mix.