a Satanist knows that the signs of perdition
are crosses inverted, a mirrored position
but sadly, the reason
is nothing that heathen-
the cross was inverted for Peter's contrition.
If you've read the bible, you'll know that Apostle Simon Peter denounced Christ in his hour of need and thus, as his guilt weighed heavy and he was captured and tried, he allegedly requested his crucifix be inverted as he failed to live up to Christ's model and did not feel worthy enough to be crucified in the Lord's manner.
So if anything, the inverted cross represents a wilful repentance and acknowledgement that one has fallen short of ***'s model. By praying to that cross, we pray for the contrition of Simon Peter, which is nice.