Christian wrote: “Thank you Lal for an explanation but then I have a question on the basis of that – how one judge then a schism in the Sangha or if one is making such schism when leads to Apayas?”
If one commits Sangha Bheda (schism in the Sangha), Nature will take care of it. Since it is an anantariya kamma, it will bring vipaka at the end of the current life and be instantly born in an apaya.
– No one else need to make a judgement.
This is very clear from the account of Devadatta. The Buddha did not take any action against him. Devadatta even remained a bhikkhu until his death.
