I understand.
The answer is still: they're not.
As explained above, the ten commandments are a whole. Digress on one and you digress on all.
The severity of a sin is based on the sin itself: mortal and venial.
Gravity applies to the severity of a sin, not the ordrr of the commandments.
I hope this is clearer.
Okay, can you explain to me how Satanism (against 1st commandment) can be more grave than abortion (5th commandment) then, if all the commandments are of equal importance?
It would seem to be that what is lacking is a differentiation between the immediate and final end of each commandment, where idolatry is a graver sin since its immediate end is the dethronement of God, while murder has an immediate end not against God but against one's neighbour, and has as a final end an offence against the Providence of God.