Leaving a sinner in his sinful state is where much of modern evangelism fails in its message. God loved us when we were still sinners but God does not accept sinners into His Kingdom.
Now the other side of the coin is this. There is also a message in modern evangelism which says that unless one is "perfect", they are no longer a child of God... they are a sinner. I've seen people who have stumbled, done something they regretted and rather than lovingly help them up off the ground and reminding them of 1 John 1:9 and saying "Let's go see the King", these people have been roundly condemned and driven away. I don't believe that is right.
We are in a battle and yes, there are times I follow after the flesh rather than after the Spirit. Sigh... one time is too many times. However, I also remember King David. God knows the desire and content of our hearts. He remembers that we are "children" and but "dust". He remembers that temptation is all around us and we live in a dark and dangerous world. I believe there is a difference between a rebellious heart and a repentant heart. I believe that if we yield to sin, the Holy Spirit will convict us and our response to that conviction reveals the true state of our heart.
I have been dealing with this issue a lot over the past couple of years. One of the side-effects of my brain injury makes it very difficult to control my temper when I get overwhelmed. I get completely overloaded, have trouble processing what is being said and yeah... it is tough. Now, it would be easy to try to excuse this sort of behavior but even so, I know that I need to ask God to help me deal with things appropriately when my "apple cart" gets upset. I am learning to identify potential triggers and I am learning to pray before I go into stressful situations. I am also learning to leave the room when I start getting overwhelmed and allow my husband or someone else to handle the situation on my behalf. In other words, if we know we have a "challenge", we need to take steps to try to do something about it. Sometimes God simply does things like remove tempers and such but I think most of the time, He prefers that we learn how to manage things instead. The good news, He will help us.