But....

It doesn't really fulfill 'mark of the beast' because it's not something you put on people, but something you write about people.

No, the 'mark of the beast' refers to vetting numbers (CRB or equivalent) that, in a few years time, will begin to be branded on employees' foreheads and right hands.

Plus, it's not being advocated for the entire populace, but for people who break laws.

Give it time. To venture into the world outside your home is to risk the possibility of encountering a child, so CRB vetting will soon be extended to the entire populace. If you can't meet the requirement, you'll have to stay indoors and arse around on the internet.

someone with a 'killed soul' (even if you took it literally) would still be able to topple his rule.

Well, biblically, I don't think someone with a 'killed soul' would be in much of a state to do any toppling, tippling, tittering or anything else. They'd be dead, wouldn't they?

If I found out someone raped me as a baby I'd think they were an awful person and want to get revenge on them...

Maybe that was Herod's objective: try to turn Jesus into a first-century Charles Bronson and thus disable his ability to offer himself as a perfect sacrifice.

...and stuff.

What would you be stuffing and where would you be stuffing it?

Maybe some atrocities of the past are so bad even the scriptures don't detail them?

Hm, I doubt it. The bible is pretty candid, even about God's own atrocities. If scripture doesn't hold back from describing his murder, via a couple of she-bears, of 42 youngsters for calling Elisha a baldy-head, I can't see it censoring tales of what the bad folks were getting up to. (2 Kings chpt.2 if you want the details).

If such a thing were ever mentioned in the new testament I really doubt the catholic church would have chosen it as holy.

Lol! Really? Well, most of the nastiness is admittedly more in the OT (though crucifixion is fairly nasty as well) but I think they regard all of the bible as 'holy'. Even that little morality tale I referred to above.

killed right when they were born in stuff

I don't think that had anything to do with Herod; sounds more like they suffocated as they popped out into the stuffing.

he was already ... on his way to gathering followers and making miracles at a young age.

Thirty isn't that young by first-century standards; or maybe you're dipping into NT apocrypha there.