Is there a word for not being sympathetic to a position, but also not being ardent towards it? [closed]

Is there a word for something like, "moderate opposition?"

Context: A friend and I are trying to find or create a phrase for someone who isn't an anti-theistic militant atheist, but also isn't an apologist for theism.

wishy-washy TFD

Informal

a. Irresolute or indecisive:

Use the adjective wishy-washy to describe something that's ineffective or that wavers back and forth without a resolution.

Ambivalent seems to fit your requirement. It's not a religion-specific word, but so much the better for that; it's important to get as much mileage out of every word as possible.

A fence-sitter or to be on the fence perhaps. Disinterested ( not 'uninterested', I know the difference)