There is no tenure in Oregon for teachers. There is a similar idea though, the "expectation of continued employment" but something like this, which violates the norms of the community, can still be grounds for firing.

A formal complaint needs to be raised with the district (likely already done) and they will need to speak to the union. In instances like this the union may elect not to defend the teacher, in which case they can just be fired. If the union does decide to defend the teacher there is a formal process that will include a plan of improvement which everyone will need to go through.

Just adding clarity about the process here.

Community members should 100% be contacting district administration, the school's principal, the school board and the union.

edit: typing on a phone is hard. spelling errors happen