Mainly, sin is a product of the fallen nature,and a rebellious action by the sinner. It is not approved of by God, and is why Jesus came to be the substitute. Ok...but, in certain cases, God uses the sinner for a purpose.Like, at first glance, we look at Judas,and we would think he's the biggest traitor of all time.But ,it was all part of a plan.If Judas DIDN'T turn Jesus in, and Jesus didn't go to the cross, we'd all go to Hell!!And those Roman soldiers, and the Jews who clamored for the crucifixion..sure, they did it with sinful intent,BUT, again, God controls foreordained circumstances, so, even though the devil might have "stirred them up", it was part of "the plan",and again, if they didn't do that, Jesus would have "walked", but WE would've gone you know where!!Even with the Antichrist, look how many people get saved because their eyes are opened.So my point, although some sins are "random" and don't affect too much in the bigger picture,also by these examples it would bear out that some sinners are used by God for a purpose,and if it's part of Gods plan, in the bigger picture, though they're still doing it with sinful intent,good comes out of it. Eh?