If the statue was an old historical statue of Christ, would you feel the same?
Yes.
Maybe a better example would be a famous statue of a woman kneeling praying to Christ. Would that be ok?
Yes.
In either case, if I let something that miniscule bother me, that is on my vehicle but represents my states choice in what to put on a license plate...I would pay to change it if that option was available.
Personally, I would LOVE to have the Rain God statue on my car. Hell, I'd love to have it on my wall on canvas. I think it's beautiful.
If the statue was of Jesus or a woman praying to Jesus, the question would never come up. It would never be allowed to raise the question in the first place. We don't allow depictions of Christ in state documents and a state issued license plate is a state document.