If Jesus died for us knowing that we were still sinners, and if Jesus died for sinners, how should we react to sinners? Shouldn't we also be willing to die for those who sin against us? To give our lives for them, that they might have another chance come to know Christ? Who knows, maybe they would repent if we died for them. Jesus didn't know who would repent, but he died knowing that his grace would be wasted, because most people wont repent.