Re Surah 47:4
You seem to be ignoring the words "in battle" - what the hell do you expect fighters to do in battle - roll over maybe?! In any case, the full context of the verse might suggest to the very moderate Muslim that 'smiting the neck' does not mean beheading, but rather the general act of subduing/defeating - see the words which follow.
The moderate Muslim says that all mutilation is forbidden on the basis of Surah 4:119 and certain hadith, even though these were referring to specific situations, they recognise that all humans are God's creation, God's property - and as such are to be treated with respect.
Re Surah 9:005
Read the CONTEXT!!!!!
004 - Don't harm those who haven't harmed you - even if they happen to be unbelievers.
006 - Protect unbelievers who seek protection, no forced conversion.
And you've done exactly what the terrorists do - taken odd verses out of their literary and historical contexts. How 'bout this for Christ's example:
Luke 19:27
But those enemies of mine who did not want me to be king over them—bring them here and kill them in front of me."
Luke 22:36
He said to them, "But now if you have a purse, take it, and also a bag; and if you don't have a sword, sell your cloak and buy one.
Matthew 10:34
"Do not suppose that I have come to bring peace to the earth. I did not come to bring peace, but a sword
Perhaps you prefer the Old Testament stuff:
1 Samuel 15:2-3
This is what the LORD Almighty says: 'I will punish the Amalekites for what they did to Israel when they waylaid them as they came up from Egypt. Now go, attack the Amalekites and totally destroy everything that belongs to them. Do not spare them; put to death men and women, children and infants, cattle and sheep, camels and donkeys.' "
Wow - this amount of destruction is actually forbidden in Islam - even in battle!!