Quick answer: killing 500,000 people is greater from the world’s point of view in that it has greater temporal effects. From God’s point of view I am tempted to assume that means it’s the greater sin but I don’t know because I am not the judge, so I don’t know if this is enough information to decide.
A recurring theme I have is to not make quick judgments on the sinfulness of an act by its outward appearances. Again, I’m talking about the effects of how much it grieves God which we do not quantitatively know, and not the physical damage which we sometimes can measure.
“Everybody” would say murder is worse than insults, but Christ specifically compared the sin of anger and insult toward a brother to murder. Would I rather another person murdered me or insulted me? That one’s obvious. Which grieves God more in any specific situation? I dare not guess. Which one will cause a person to burn in hell, well obviously either one can so how much more drastic can one get?
Same way with missing a Holy Day. If it is a mortal sin which can send me to hell for all eternity, then it’s not much comfort that someone on earth thought my sin was less than
Dr. Tiller’s. All the pontificating in the world doesn’t help me.
If anybody doesn’t agree with me, I challenge him/her to explain to me the whole point of this Good News:
Sounds like all I have to do is say, “gee I only missed Mass it’s not like I killed someone” to put ourselves at risk. By judging the other person lower, we have taken a higher place for ourselves and risking being put down. He who exalts himself (including in comparison to others) will be humbled.
Alan