Which Islam groups are for death by stoning after adultery, and does this apply to every follower within the group in question?

I saw a video about one or two years ago which i cannot seem to find at the moment, in which there was a muslim speaker preaching about Islam to a bunch of children, whom were also obviously muslims. In the video the speaker asked questions, and this was one of them (Probably not accurate word for word): "The Qu'ran tells us death by stoning is the right punishment for adultery, so whom of you in this room think that this is the right punishment for adulterers?" Every child in the room as far as I could tell were pointing their arm to the ceiling. Does every child in the room want to kill adulterers with stones, or am I missing something here? Is there a specific group/groups of islam followers who would be more primitive and violent like this than other groups?