I think that they really failed to make these Grove tieflings sympathetic, purely because all the adults enable these dick kids. And they will fight you if Mol says one word to them, rather than making sure the kids wouldn't cause trouble for the whole group.
I think you really aren't seeing the... problematic... nature of your position here, by saying it's okay to murder small children if they steal things, even though in virtually every society on earth, those kids would be well under the age of criminal responsibility, and obviously are... children.
Also Mol basically accuses you of being a molester, and your "the adults enable them!" is incredibly pearl-clutching and silly in that context. Any group of adults would be likely to be pretty concerned about this blood-splattered weirdo who'd suddenly barged in and was going around having angry conversations with children. That you think they're enabling them is a bad parse of the situation on your part.
I've already explained that the majority of adults aren't the parents of the children, are clearly suffering PTSD and other trauma, as well as grief from the loss of a lot of people and their own humanity, but you're acting like they're some awful 20th-century ethnic stereotypes who encourage their kids to steal.
Further, the druids make absolutely no attempt to impose any kind of order on the tieflings or their children beyond potentially murdering a small girl for stealing from the druid area, so this whole "Well they don't respect the druids!" thing rings very hollow, especially as the druids are essentially proposing to murder all the tieflings.
I'm not really seeing the difference to goblins, here
I mean, you're not seeing the difference between low-level, disorganised theft and hoarding of random shiny objects, and organised, directed slaughter, torture, slavery, brutality and pillage?
I think that's a you problem, dude. Any human should be capable of distinguishing those two things trivially. Why can't you?
Is "murdering 8 year olds is cool and righteous!" really the hill you want to die on?