In short: You are ignorant of the basic tenets of Christian faith.
There is none. God doesn’t change. Never has, never will. When Jesus was crucified and resurrected, it was the rules, or covenant that changed. We don’t have to do animal sacrifices anymore to have our sins forgiven. Jesus was sacrificed for the sins of the world. The original rules dealing with sacrificing animals became irrelevant.
Inadequate spin? I thought I did a good job of explaining it. If the proof I provided was insufficient, I can’t imagine what proof would be sufficient. Just for giggles, I’ll point in the right direction. If you have the time and patience, read Hebrews chapters eight through ten. In a nutshell, it explains that the old covenant with the Lord was replaced by a new covenant after the death and resurrection of Jesus. Things that were necessary under the old covenant do not apply to the new. Taking the Lord’s name in vain being unforgivable was under the old covenant. Blaspheming the Holy Ghost is unforgivable under the new covenant. Got it? Good.