There are a few different ways to describe this situation:
You could say that the group was engaging in a rationalization, being evasive, or that they were having an avoidance reaction. You could say they were copping out, or fudging the issue, or dodging the question.
I hope this helps!
I think I've got it- You would say that those people took the path of least resistance. This has become a common phrase, now but it was originally based on observation of how water flows down a hill.