I’ve read that the translation doesn’t necessarily mean “little boys” as if these were children who were just teasing him. The words
Naarim ketanaim could mean any age from 12-30. (I’m no expert in Hebrew though- I’m just reciting what I’ve read). These same words were used to describe David when Samuel came to anoint him, and David was a young man at that time. So I don’t think it’s fair to blindly interpret this passage as divine wrath on little kid’s teasing.
Also, “baldhead” meant more than someone who was prematurely balding. In the East, it was an epithet of utter contempt. Read Isaiah 3:17 (God will judge the sinful people and bare their heads as a mark of social disgrace.) Additionally, I read that Elisha would probably have had his head covered as the usual dress of the prophet of God. Either way, Elisha would have been wearing the mantle of Elijah, the foremost prophet of God at the time, and as such he required respect. The young lads were deeply insulting God’s prophet, and it seems like they may have been mocking him in his journey to Bethel, a major city of sin at the time, or to go up to heaven like Elijah had.
Anyway you look at it, you have to remember that in the Old Covenant, God was having a handful preparing Israel for his Son’s coming. He had to get them in a state where Jesus’ message would have some effect on them, otherwise his Son’s Gospel and sacrifice would be pointless. Humanity had rebelled against the Author of Life, and God had to bring them back to him all the while respecting their free will. Israel had to become holy as God is holy.
The Israelites turned away from God to worshiping pagan gods again and again. Sometimes he felt it necessary to have the Israelites themselves kill the pagans in order to strengthen their resolve against false gods and prevent the pagans from leading them astray from God. Any righteous men that died before Jesus were sent to the “bosom of Abraham” from where they were led to heaven when Jesus descended into hell.
I urge you to not be turned off by what you may think are lengthy and “reaching” explanations for difficult Bible passages. Just because you interpret a passage in one way, the first time, from your 21st century worldview, does not mean that it is the correct interpretation. Mature faith involves trusting that God will lead you to the truth even when great difficulties present themselves. The proper response is not “This is unbelievable. It is impossible for me to have faith anymore.” It is “Dear God, help my struggle to understand and grant me faith. Let the light of your truth penetrate the darkness of my soul.”
I read this link for an explanation of the context of the passage (pages 16-19):
gts.grace.edu/documents/Messner-ElishaBears-GTJ.pdf