But there are some evidences and arguments that many intelligent people judge to be persuasive.
Then those so-called "intelligent people" are irrational.
I disagree. I think if you're honest with yourself, you'll find that a lot of the evidence for and against Christianity is a judgment call. For example, since we don't have a time machine, none of us can go and see whether or not someone named Jesus really was crucified, and really was alive three days later. And so we're left trying to weigh the plausibility of the historical accounts, but in terms whether or not the authors seem believable, as well as whether or not the documents really are authentic.
The same thing goes for answered prayer, and/or hearing what might be God's voice. The theoretical problems with testing this empirically are widely known, and I'm not going to try covering them here. And so, without the assurance of our normal scientific / mathematical tools for looking into these things with certainty, we're left making a judgment call.
You may have also noticed that all of us, atheists not excepted, sometimes make mistakes in our reasoning. Even more frustrating is that our reasoning and our acceptance of what constitutes evidence can be biased by the conclusion we think will make us happiest to reach. I think it's safe to say that for most people, if they want to find a reason to believe or disbelieve Christianity, they'll find a way to make logical constructs to support their conclusion. You and I are probably no exception to that.
So getting back to your original claim that Christians are irrational. I agree. Because I think we all are cursed with a strong streak of irrationality. But we only have so many years on this earth, and so we're stuck with making our best guess and running with it, hopefully also being open to changing that belief if/when there's a good reason to.