It isn't that God won't heal amputees, it is that we do not have faith that
he will. We limit Him. It says in the Bible...let it be according to your faith.
So, if I've read this correctly, you seem to suggest that God is somehow hindered by our lack of faith. Since when is your omnimax deity dependent on his creations faith in order to give range to his powers? If your deity is omnipotent it shouldn't matter who or how many believe in him. "We limit Him." If God does exist how do mere humans limit the powers of an omnipotent deity?
I have a friend that has a mentally challenged son. He cut off his little toe in an accident. He told him mom about a week later to look at his toe that grew back. His mom told him that toes do not grow back, but he said "I prayed for my toe to grow back and God made it grow back." The Bible says we have to have faith like a little child. How many of us in the modern world have that kind of faith?

Oh you Christians and your silly, made up "God", "miracles", and "healing" stories. Oh you guys crack me up

But being serious now and detracting from the sillyness... unless you can provide proof of this magical toe growing back from being cut off, your claims have no merit what-so-ever. In echoing the previous posts and what every other atheist will say, "We require evidence sir/madam." Unlike you, we do not take anything on blind faith. If you want to convince us that this toe did grow back and God did it... fine... show us the proof.