In the context of "pure" Christianity, >>642787 is right.
It's bait.
Because guardian angels are valkyries.
It's very difficult for people to stop "believing" in the truth that needs no missionaries.
Strictly speaking, the god of the bible is omnipresent and omnipotent and has power over all.
You only need to accept Jesus Christ as your savior and follow the commandments, no angels that watch over you personally needed.
But, again, it's difficult to not believe in what is really there.
It's not without reason that there is no country or nation in the world that is purely christian, there's always some remnant of heathenry at least.
Missionary faiths are the antithesis of truth.
Do you need me to tell you that dogs piss on corners?
Of course not.
So why does Christianity need constant re-teaching, apologetics, preaching, proseletyzing and co?
Because everyone knows intrinsically that people drift away from it.
People never drift away from the truth unless something overrides it with false teachings.
Like atheism, communism/marxism, etc.
These also need constant upkeep because people naturally drift to the real truth if left unchecked.
You can be the biggest liberal marxist christian diversity lover.
Play a single (video) game and you'll be fascist, conservative and other evil things that give you the best gains.
You don't distribute your land to others just for free and to destroy borders in civilization and co.
At least not usually, etc.
But yeah. I'm on a hostile board here.
I can be banned for this, and it's generally agreed upon that that means I'm wrong.