The thing is, we all have the same "evidence" available to us. This is where the 2 worldviews just can't comprehend of where the other is coming from.
I can research Christianity intellectually and decide there's enough for me to take that step. Which is what I did. At which point, God has made Himself known to me time and time again. So, to me, I have unimpeachable proof, because I've experienced it and not believing makes no sense to me. I've only been a Christian 2 and a half years, and yet I honestly can't remember why I was an atheist. The reasoning seems entirely alien now.
Another person, however, can research Christianity intellectually and decide it's all bunkum... and it stops there. They don't experience Him, and the more they don't experience Him, the more they don't believe. Nor will they be able to comprehend why others do.
But we do all have enough to take that first step. If we didn't, none of us would have taken it. Ever.