The way faith is treated in the First Century doesn’t translate well to modern audiences. Having faith of a child isn’t an analogy to a child being gullible. It’s an analogy to the way a child trusts in and depends on his parents. Trust, arguably, would be a better translation than faith in many instances.

Faith for ancient religious peoples wasn’t about believing without proof. That would be as ridiculous for a First Century Jew as it is for us. Faith is being persuaded to a conclusion by the evidence.