"Christians could possibly become a minority religion" (the OP)
Straight from the mouth of Jesus.
“Enter by the narrow gate. For the gate is wide and the way is easy that leads to destruction, and those who enter by it are many. For the gate is narrow and the way is hard that leads to life, and those who find it are few."
"Few" does not equal majority, there's no way to reconcile that. We tend to ignore hard to comprehend Biblical facts that don't fit our perception of what God should be.
