(If you're looking for part 1, scroll down a little bit.)
So, let's talk about this sentence: "You have to have faith." (I guess I should say, "Let's talk about it again," cuz we've talked about it before.)
Now, I usually hear that sentence when I've expressed to someone my doubts about this or that religious claim. My interpretation of the sentence is this: "You can't expect absolute, irrefutable proof on these matters. I mean, God isn't going to walk into your kitchen and confirm the truth of the whole Bible for you. Some things, you just have to take on faith..."
(That's actually a super-literate interpretation. For a lot of people, the statement, "You have to have faith" is just a reflexive response to religious doubts/doubters.)
Fair enough.
Now, what if I told you the following: "Two thousand years ago, on an island in the middle of the Atlantic, there was a tribe of giants, 500 in number, each of whom was 20 feet tall. They're not around anymore because the island was destroyed by a massive tidal wave. But in their time, they were like nothing the world had ever seen before...and like nothing the world has seen since."
If I told you that, swore it was true, and asked if you believed me, I wouldn't expect you to say, "Of course." I'd expect you to be skeptical...very skeptical. After all, everything in your experience tells you that giants don't exist and never have.
Now, if you said to me, "I suppose I might believe it, but you'd have to prove it to me," then I might say, "How? You want me to build a time machine and take you back to the island? Obviously, I can't do that. You just have to accept what I'm telling you on faith."
At that point, you would probably say, "Don't be ridiculous. I just want to know how you know the story is true. Are there historical records? Artifacts from the island? Contemporaneous accounts from credible sources? Skeletal remains? Is this something that unbiased historians of the ancient world also believe? If you can show me enough of that kind of evidence, then I might believe you."
Note that you might believe me even without actually seeing the giants for yourself, seeing a photograph, etc. In other words, you might believe me without absolute, irrefutable proof. You might make a leap of faith...but it would be a leap made from the top of a pile of evidence.
In my mind, telling me theological stories and asking me to believe them on faith alone, without compelling evidence--not definitive evidence, mind you, but compelling evidence--is like telling me a story about ancient giants and asking me to believe that on faith.
Footnote: Some people believe that the evidence for their theological stories is compelling. I don't agree. In fact, the more I learn, the more I'm shocked by how paltry it is.
Anklenote: Some people believe that God wants the evidence to be flimsy. If the evidence for, say, Christianity, were exceptionally strong, then it would be hard for anyone to deny the truth of Christianity, and we'd all be Christians. This wouldn't be satisfying to God because he really wouldn't have earned our love and faith...we would have come to him as Christians only because the evidence was so strong as to be virtually undeniable.
To that I say, read your Old Testament. For that matter, read your New Testament.
The Old Testament is the story of the Jews repeatedly defying God despite his having revealed himself to them, having made a covenant with them, and having told them that they would enjoy peace, prosperity, and privilege if only they would obey him.
God did all of that, and the Jews still refused to obey.
The New Testament is the story of God saying, "You know, I laid out the whole deal for these people--made the whole God-man relationship crystal clear, performed miracles, followed them around as a pillar of smoke, etc.--and they're still defying me. I don't think they're ever going to get their shit together on their own. I guess I'm going to have to send a special emissary down there to deal with this directly." (Spoiler alert: God's people were still so defiant, even when confronted by God's special emissary, they asked the Roman authorities to kill him.)
See what I'm getting at? Even when God presents irrefutable evidence of himself, his essence, his goodness, and his desired relationship with man, people STILL reject him. In light of this, it's a ridiculous theology that says, "No, God has to keep the evidence flimsy. Otherwise, everyone would embrace him too easily..."