Hold up
MAshiach agent
“no sin in life is ever allowed to be done even if its unintentional.”
You do know this isnt true. right?
Especially by hilchos Shabbos. Where mileches machsheves is required. But even by other halachos It is used though not as much.
I am not saying if unintentional it is automatically allowed but it isnt always assur either. Eg. davar sheino miskaven if it isnt a pisik reisho is allowed in some cases.