[duskdozer]

I'm not sure that it has to be on a consciousness levels. I think it can be explained by anxiety/fear.

[hoppp]

Yeah, It could be fear of rejection or not fitting in.

but if you ask somebody after they exited the groupthink state they will not say they did it out of fear.

They often say: "it just happened"

Why were you behaving like that?

"We just did"

Inability to explain reasoning points to subconscious mechanisms.

It's deeply built into humans to groupthink.