The OP suffers from more plotholes than this movie, aka the rule of loser. For example;
"Why is he carrying the bible? Because it's the last one and he wants to bring it...somewhere. Yeah, that's big plot hole number one. That's the last bible? Really? There are like 4 billion bibles in the world and this is the last one? They even say that people went out of their way to burn bibles (because they started the whole end of the world war) but still, I really doubt they could get each and every last bible in the whole world."
Did you consider that perhaps he believes that without the necessity of it actually being true? Or, perhaps it is true. Is it really that much less believable than a guy named Luke carrying around a sword made out of a laser beam rampaging across the cosmos moving things with his mind?
"Let's do the math. So I know where Eli eventually ends up (it's on the very west cost) but we have no idea where he started. We can assume, though, that he started somewhere in the us, because of his accent and language. Now, let's give him the benefit of the doubt and say that he started WAY on the other end of the US, like around Rhode Island. Thats about a 3300 mile journey from one side to the other. Now, lets do the math to see how many miles a day he had to walk, in 30 years, to reach his destination. Ok, so it comes out to about less then a mile, to only about 1500 feet. Was he just really fucking slow? Did he spend 28 of those years just goofing off? Even if he didn't go in a straight line it's pretty fucking unrealistic."
Right. Let me guess; the longest walk you've ever taken was down to the local nambi-pambi organic food mart for some high-quality vegan food on level ground carrying nothing but a pocket of change, wallet, ID card, and a couple single-use KY Jelly applicators. Use MapQuest to your advantage; I'm looking at your 'straight line' from Providence, Rhode Island to Alcatraz Island, California. Now, let's just assume ol' Denzel didn't have the post-apocalyptic Mapquest app on his 1st-gen iPod. I know that's probably a glaring plot hole to you, but jut try to force yourself. I see the Rocky Moutains, the Mojave Desert, and the state of Colorado that probably tried to lynch him every 20 feet. These are hard to cross when you come to cities every other day; not to mention 30 years after the bombs fell.
Referring to your last so-called plothole; the destruction of every single Bible in the Continental United States. You seem to be under the impression this would take a day.
Let's do the math; according to you, there are "like" 4 billion bibles in the world. You seem under the impression they were all destroyed the day after the bombs fell. So, 24 hours in a day, 4 billion bibles...that only comes out to 166,666,667 bibles that need to be destroyed per hour. Wow. I submit that the amount of smoke produced by burning that many bibles might just exceed the amount of dust created by one of the nukes. Did you ever consider the destruction of every single bible (minus one) in the U.S. might take more than a year? More than 5? It'd be mighty easy to start with, then you'd have to start hunting down the ones that were hidden. By the way, did you notice you seem to have set the world's Bible population almost as high as the world's human population? Subtract all citizens of China from that number. Feel stupid yet? Maybe he found the Bible 15 years after the bombs fell. Maybe 20. Maybe he had JUST found it? He never says he found it the day after the war.
"There are lots of little weirdnesses too, like how eating human flesh apperently makes your hands shake for some reason"
Cannibalism causing hand-shaking...hm...I remember reading that before...ah! Yes! Apparently one would have to consume the brain of one person with any of the following; Mad Cow Disease, Kuru, or any of 5 human variants of Creutzfeldt?Jakob disease in order for hand tremors to be a symptom. Ah, yes, I forgot, you could also eat somebody who ate somebody who ate somebody who had one of these. Since cannibalism in this world seems common enough to deny services to customers with shaking hands, this seems somewhat likely. Also, if you had to choose somebody to eat would you pick the healthy looking guy who could break you in half and looks like he opens doors from the HINGED side, or the shaky, elderly, sickly guy who's a much easier target?
"and how Eli still has a functioning mp3 player more then 3 years after the destruction of the world."
Okay...you got me on that one. A functioning MP3 player more than 1 year after being purchased IS a huge plot hole. Especially one made by Crapple. As the hijacker at the beginning said, 'I AM IMPRESSED!!!' I'm assuming, however, you meant 30 years?
"Or how about his completely unexplained ninja skills?"
Let me replace this with another phrase; "Or how about his completely unexplained lightsaber and acrobatic skills?" It's a fucking movie. God, 'The Force', it's all the same to Hollywood. Besides, 30 years is enough time to become a ninja; maybe he spent 29 of them at a dojo? Maybe he learned from Keanu Reeves. You heard him when the guy asked if he had toys..."nah, nah I don't play..." Thaaaaaaaaaat's RIGHT. Denzel don't play. He's too busy kung-fu fightin'...
And here's the one that I can't EVER seem to get a straight answer out people on; how the HELL do you know he's blind? Because Gary Oldman shouted "HE CAN'T BE!!!" at the end? I agree, he can't. Is there some reason a seeing dude can't be carrying around a braille bible? If it's the last one on Earth, how choosy can you afford to be? I don't speak Spanish but if I'm lookin' for a Bible and I see that the last one on Earth is in Spanish, well I guess I got me 30 years to learn me some Spanish.
One thing I din't understand about the plot; the bikers below the Fallout-ripoff freeway seemed awfully intent on raping the blonde chick...then...put her pants back on? Plot hole? Maybe...odd? Yeah, I thought so.
