parallels:
- a wicked Israeli king sends soldiers to Elijah on a hill saying "come down!"
- wicked Israeli men serving Molech accost Elisha passing Bethel saying "go up!"
- unbelieving Israel blasphemes Christ on the cross saying "come down!"
note that both Elijah & Elisha are typological figures of Christ: Elisha of His first advent, come to save, as priest -- and Elijah of His second advent, come to judge the world, as king. so when Elijah and Elisha are told to 'come down' or 'go up' - they are both prefiguring Christ; again: the entire point of the OT being recorded is testimony of Christ. that is the first and foremost interpretation. these are literal men and true accounts, but they are recorded because what they did and said are figures of the Lord Jesus.
in the case of Elijah and the 3 captains with their 50's and Elisha with the 50 military-age young men, the LORD responds with judgement. we see that the parallel passage in the life of Christ is His crucifixion, and that there, what these people do by saying "come down" and "save yourself" is defined specifically by scripture as blasphemy. Christ is God; He cannot be 'saved' and to think He must be saved is blasphemy. for Him to come down from the cross would be to make void salvation and withdraw His atoning sacrifice for us all.
likewise therefore with Elijah & Elisha, what the groups of 50 are doing is blasphemy, in type. they are commanding the man of God ((vis a vis the God-Man Christ)) in such a way that denies their anointing by God. if Elijah is truly a man of God, then he is not the servant of a wicked king to 'come down' at his beckoning, unless in judgement. if Elisha is truly a man of God, then he does not 'go up' to the abominable high place at Bethel, unless in judgement.
both these groups of soldiers accosting Elijah & Elisha have the intention of murdering them, hating them because of who they are and God whom they serve, and the message they bring. likewise with Christ, the very same people who sought to put Him to death are the ones at the cross mocking Him and taunting Him to come down from it. what is their intention were He to do so? they would seek to kill Him again, immediately.