But the Vatican refuses to accept this because of all the Saxons he killed

'Many people in Aachen consider him [Charlemagne] a saint,' said Stefanie, a willow-haired tour guide in the cathedral. 'They pray to him and they say miracles happened because of him. But the Vatican refuses to accept this because of all the Saxons he killed. As if all the other saints were so pure!' 

N. Jubber, Epic continent (2021), 149

The execution of a king was a greater sin than the Crucifixion, since Christ had not actually been anointed

Some Jacobites believed that King James II should have been canonised like St James because of his devout Catholic faith. Others believed that King Charles should also be canonised as 'the execution of a king was a greater sin than the Crucifixion, since Christ had not actually been anointed, and that he was simply the uncrowned King of the Jews'.

R. Pound, 'A shrine to the Stuart dynasty: Lord Burlington and Jacobite symbolism at Chiswick House', Royal Stuart Journal 9 (2018), 34