Personally, I would likely confront the thieves as well. I just would not like the threat of having a criminal in that close to my home. That being said, in NC i cannot use lethal force for property crime. Lethal force is simply pointing a loaded weapon at them. I would do two things first.
1. Panic button on home security. The horn in that thing can be heard 4 or 5 blocks away.
2. I would go out the front door which would allow me to confront them with a large brick and concrete porch between us (cover).
If they upped the stakes and pulled a weapon, I would be in excellent position to draw and fire from cover, they would have little to no cover, my security system would be going off, I would already have lots of witnesses around me. I would also bring my dog out with me. If they used lethal force they would be dropped. If they approached intending to square off, they would be hit by OC spray and an 80 lb dog.
Couple thoughts, I am imagining the setup for my home in this. which would give me a good advantage in terms of cover, visibility, and surprise. I also have a wife with a 12 gauge in the home behind me in case they deciding to try to get into the home. I am also assuming I can see the couple of shadows not half a dozen shadows.
It is definitely a risk to leave the home and confront them in any manner. However, IMO, it starts with idiots hitting cars, then they move to out buildings, then homes. If they are stopped cold at the car stage, I will not see them trying to get through to my home a couple months later after they have stripped my cars and outbuildings of anything of value. IMO, if I can confront them (at my own risk), keeping the advantage, and keep them from getting to the next layer of security that is a win for me.
Would I go out the door in plain view, with no cover, with lethal force as my only option, no. You have no advantage in that situation. Personally, for the OP, if you are going to confront them I think you may have been better going out another door and confronting them while keeping an advantage should it have turned into a firefight. if those guys had been carrying, they would likely have shot you right where you stood and if they missed all their rounds went into your house. I think if you are going to confront them you need to keep the advantage overwhelmingly on your side.
We can debate the validity of risking yourself in the confrontation to protect your property, I think there is good value in also considering this option as valid for some and engaging in the better way of doing it.