One correction Jesus comes to save humanity from SIN the devil is kinda just a symptom more than the root cause
I'd also add he is betrayed by his disciple and his government and then tortured AND killed and during his 3 days of death he's sent to HELL before rising himself up to defeat death...
First the children ARE summoned just not in the way you are most familiar with
Secondly They (or at least Lucy) was met by a representative of the snow queen the only "royalty" of the land at the time
Thirdly the snow queen literally represents the actual devil not a demon "lord" not a demon...
The janitor appears behind you without you noticing and whispers softly in your ear "I'm not "omnipresent" I'm just cleaning up messes before they get... too messy"