Question Author
SVEJK,/// the fact he was a member of a particular sect would have been known at the time and that may be the reason for his death.///
a) I haven't claimed that I know why he was killed. (i put a theory forward for discussion)
b) If you and Professor Gromit pause to think about things. He has been a member of his sect, presumably, since birth. He was murdered a couple of hours after posting Easter greeings to his Christian customers.
So, probability would suggest the latter was the reason. (but as I have to keep saying, I don't know it for a fact.)