Because GOD is just


He will not tolerate the sin because of how great He is

Think about when something crazy happens and a person says "holy shit" or are at a loss of words. Now imagine being stuck in that state of bewilderment as the host of heaven continuously say "HOLY HOLY HOLY" at the glory of GOD. So that's a testament of how good GOD is. And we're tainted with sin, in a sinful world.

But GOD is so good and loves us so much that He is willing to pay our debt for us.

Does that make sense? The debt must be paid, otherwise GOD is not good because he's condoning sin saying it's okay. It isn't okay and that debt must be paid.

Is that what you're asking?