1) Why would anyone want to kill a lion?
For shits and giggles.
2) Why fly all that way? There must be hundreds of lions for him to kill in the good ol US of A.
There are but they're all in zoos, you can get in trouble for that sort of thing!
3) Why, for the love of all's that holy would he use a bow and f^&%ing arrow?
See answer 1
4) Why not go to Barbados, Australia even Vegas instead? Not to kill anything, just relax, have a good time, treat the wife and kids.
See answers 1 &2
5) Why is it legal to kill a lion if you pay tens of thousands of dollars?
Everything is legal if you pay enough money.
6) Why would he post numerous pictures of all the animals he has killed on facebook?
A better question would be "Why Facebook?"
7) Why is he such a rat-faced, scum-sucking, reptile, worm-maggot, of a soulless turd?
Probably a rag.