Yes. It's utter nonsense of course, and a fringe argument even among shroudies.
Amusingly, the insistence that the blood must be AB is down to a facile misunderstanding that, loosely summarised, Jesus died for everyone therefore his blood must be the Universal Donor, therefore AB.
Now as anyone with a basic knowledge of first aid knows, O- is the universal donor group. So, when appraised of this basic error, the shroudies changed this to Jesus being the Universal Recipient.....
It's bollocks of course.
There has never been definitive, or even mildly supportive, evidence of any blood on the cloth, let alone evidence that it's human or of a particular type.
But, hey, when you desperately need to believe you embrace any supportive lie.
So
@bobdroege7 will you be posting evidence of your prior claims?
1. Evidence of blood on the cloth.
2. Evidence of statistical errors in the radiocarbon dating.
3. Evidence of contamination on the samples used for the radiocarbon dating.
4. Evidence of the sampled area being part of a patch.
5. Evidence of fraud on the part of Anastasio Ballestrero.
6. Evidence of limestone from Jerusalem.
7. Evidence of a connection between the shroud and the Pray Codex.