Then I don't really see how God's answer to losing a leg (or any such calamity) doesn't boil down to "literally just deal with it bro." Which is, no doubt, solid advice to someone who needs it.
I agree the author of the site does not understand God from the aspect that a Christian would (regardless of whether he is a former Christian). So while some may say by me saying that I'm about to pull a "True Scotsman" fallacy on what a True Christian would say I would counter by saying he is merely "straw manning" what God, the Bible, and a Christian would say and is taking things out of the context of the Gospel whole.
I haven't read his whole site, but probably have counted atleast 5 times so far reading it that he quotes Mark 11:24 which has Jesus saying, "Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." I think the issue for non-Christians is they take that statement to be defeated by people that pray righteously and don't get what they want. However for Christians this is not an issue Jesus states in Matthew 5:45 "for [God] maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust." Job is an example of this. My point is that to a Christian these two statements/ideas are not at odds though they may seem that way at first.
So, though Jesus doesn't explicitly state you don't get everything you've ever wanted just by praying for it he does state no matter who you are you good or evil you will have good and bad in your life. To me, I believe God does bless us for good/prayer just not in the way we may expect and ultimately all wrongs will be made right and justified just maybe not in this life. He is not a cosmic vending machine of which when we do a good work we are instantly gratified.
One of my main points in saying all this in a more general way is that to non-Christians The God of the Old and New Testament may seem to contradict himself, but I know there are answers to every one of those possible supposed contradictions even though not every person may immediately know the answer to every one of them.
> The God of the Old and New Testament may seem to contradict himself
Hmm. The context of who said what and what was said by whom gives additional meaning to the words. And to the person ignoring context and making one big salad/soup of it, the Bible can seem difficult to comprehend. Further complication is when ideas like "the word of God" is added to give it weight despite majority of it is in fact an inspired script or the statements of those who studied under the Rabbis (including Jesus).
It seems even in the most thorough studies of Christianity, the entire subject is challenging. And the difficulty can easily fall to dissuasion.