If the evidence for Christianity is so strong, then why don't more people believe?

I think (and I am not alone in this) that there is strong evidence for God in general and biblical Christianity in particular. For me, the more I read and study, the more confidence I gain in the Christian view of the world. So if this is the case, that belief in the Christian God is not just rationally permissible, but reasonable and plausible as well, then why don't more people believe in God? If God is so powerful, why doesn't he just show up and put all questions and murmurings to rest?

That's a good question! Is there an equally good response?

"...God has provided each of us with the opportunity to make an eternal choice to either accept him or reject him. And to ensure that our choice is truly free, he puts us in an environment that is filled with evidence for his existence, but without his direct presence--a presence so powerful that it could overwhelm our freedom and thus negate our ability to reject him. In other words, God has provided enough evidence in this life to convince anyone willing to believe, yet he has also left some ambiguity so as not to compel the unwilling. In this way, God gives us the opportunity to either love him or to reject him without violating our freedom. In fact, the purpose of this life is to make that choice freely and without coercion. For love, by definition, must be freely given, It cannot be coerced."--Frank Turek & Norman Geisler

For more, see their compelling book I don't Have Enough Faith to Be an Atheist