But as we have discussed before the conditions for a person to be stoned to death are by itself hard to fulfill according to Islam. For one thing the act of intercourse itself has to be witnessed by four pious people, which of course is close to impossible as no man or woman would have sex in the full view of four people!
And for another thing there has to be if not a self confession and the person confessing has to be sound of mind and ask the punishment to be carried out on themselves. Which again hardly ever will happen.
And if the requirements are then met then it's only up to the ruler of the land to decide the penalty, which the Taliban are certainly not!
All in all what happened here was pure murder and no one can justify it to be remotely Islamic.