Beck is not a Christian anymore. He is a Mormon.
He’s not a Christian and he never was a Christian. No one goes in and out of Christianity because no goes in and out of the new birth. People have either been born again or they remain dead in their trespasses and sins. The problem with Rome’s gospel is it puts salvation in the hands of the sinner. In contrast, in biblical Christianity, salvation is by God’s grace (Ephesians 2:8-9), it is “of The Lord.” (Jonah 2:9) Those truly born again “were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.” (John 1:13)
Beck was raised a catholic and later became Mormon.
To know if Beck is a Christian, we'd have to know if he's followed the Biblical plan of salvation. As he was raised catholic we don't know. Being Mormon, tells us definitely no.
From the bio on Wikipedia it gives the impression he never was a follower of Christ.
I am not to judge however.
BINGO