Your analogies suck. At least, there's due process for the electric chair for someone that's committed a heinous crime. In any event, would you rather be stoned to death?
Dead is dead. As for due process, there are more than enough cases of people being wrongfully convicted. And of course, you have to fact in Socio-economic and racial data as well. If you are poor, especially a poor black male, due process is often more like a rubber stamp. In North America, we kill convicted murderers to prove that murder is wrong. I take it you don't see the disconnect there. They have what they consider "due process", we have ours.
Barbaric economic system? You tell me that Exxon didn't pay for that spill? Aren't people as a whole better off in the west? What other economic systems are superior? The one that accounted for the Chernobyl nuclear disaster? Where's your Utopia?
Actually, Exxon got most of the money back after appeal. Look it up. Are people better off in the West? Of course they are. They have been raping and pillaging the rest of the world for the past 400 years. Just ask the Beothuk in Newfoundland who became extinct as a separate ethnice group in 1829. Or the natives that were deliberately infected with small pox. Or how about the large US MNC that moved a chemical factory to India because health and safety regulations are much laxer there, and the rate of pay is much less. So what if they gas an entire community in the name of profits, eh? How about the toxic sludge ponds that are a by-product of the Tar Sands. Apparently 2.5 barrels of toxic sludge is dumped for every 1 barrel of oil extracted. Are those ponds completely "water" tight? Of course not.
Utopia is an imagined place. Without criticism, society stands still and stagnates.
As for the original point of discussion, stoning is certainly a barbaric act. But no less so are the way we deal with prisoners. The title of this thread is a deliberate racist provocation. One can find good and bad in any religion, Islam Christian Jewish or Sikh or [insert religion].
Deliberately fanning the flames of hatred is not helpful to bridging the gulf of ignorance.