if you are talking about violent behaviours. then half the house should be expelled at one point or another. the task was physical in nature and at some point somebody would have gotten hurt. puneet intention was not he hurt anybody. he was not in a temper and wanted to cause bodyly harm to anybody. he was just trying to do the task, in the only why he knew how.
besides Puneet has been criticised for his stand for not using force in any task. due to which he has to sit out all the previous tasks, where he did not participate or performed the task half heartedly
si when he does so something to perform task, they why criticise him for it.
and besides pritam and gautam are very found of puneet and were only glad to have their friend back. they have never condoned his action. they respected BB decision when BB expelled puneet. just like they have respect bb for bringing punz in. if he goes this weekend then the justice that Arya wants he will get. and if he stays then the public did not believe his actions were out of malice or anger.
puneet will be judged by the public. he stays or goes is his luck