Who removes the veil?

2 Corinthians 3:14 NWT

But their mental powers were dulled. For to this present day the same veil remains unlifted at the reading of the old covenant, because it is done away with by means of Christ.

Didn’t Jews already believe in Jehovah? 
2 Corinthians 3:16 NWT

But when there is a turning to Jehovah, the veil is taken away.

Who must you turn to to have the veil removed?