LOL! Looks like He didn't come down on your side during the rebellion. Maybe you missed his meaning?
I'm going to correct you on a couple of points. They weren't rebels, and Lincoln initiated the war by sending a war fleet to attack them.
Yes, they were rebels. No, Lincoln did not start the war.
You have a funny way of looking at a fight where one side has a four to one advantage over the other just in people, let alone in material and logistics.
How much of an advantage did Great Britain have over the colonies?
Well first of all, it wasn't "My side", because my family wasn't even here when all of this was happening, and second of all, it was the founders that said this was a right given by God, not me.
God let the Israelites live in slavery for a number of years, so i'm not going to second guess his reasons for doing what he does, or allowing what he allows.
How much of an advantage did Great Britain have over the colonies?
England had about 6.5 Million people in 1776, and the US had about 2.5 Million, so it was only 2 to 1 odds, with the Ocean serving as a serious impediment for their command and control.
Likewise King George III was not so insane as to kill 750,000 people to get his own way. He decided to stop the fighting after about 15,000.
The South had a far harder fight than did the Colonists. Given that the Colonists had established the new paradigm of independence being a right, the South shouldn't have had to fight for it at all.