If Mormons qualify as Christians, then you don't have to believe Jesus was virgin born or the only son of God to be a Christian.
If the Pope is a Christian, then you don't have to believe that the only way to heaven is through belief in Jesus Christ.
Muslims do not believe Jesus is the Son of God, even though they consider him to be the Messiah. It should be clear that they are not Christians.
I wonder if Unitarians who don't think Jesus is the Son of God can still be Christians (even if they still think he's the Messiah, but born of ordinary parents)...
It gets a little fuzzy around the edges...
For a non-Christian you sure have a perfect understanding.
Please explain what you mean. Catholics should be interested.
By the way, Mormons do believe in a virgin birth.