"He also taught that some people's sins are soooooo bad that even Christ's blood isn't good enough to cover them [WHAT BLASPHEMY!]. "
Is it also blasphemy when Christ teaches it?
Matt 12:32 ...but whosoever speaketh against the Holy Ghost, it shall NOT be aforgiven him, neither in this world, neither in the world to come.
"And that therefore, the super guilty people have to shed their own blood for their own sins. "
I think you should read this before making such accusations:
http://www.shields-research.org/General/blood_atonement.htm