Is it obligatory to establish the proof before declaring someone an innovator or an open sinner?

The questioner : May Allah reward you with good. He says:The questioner : One does not declare a specific person a disbeliever or an open sinner until the proof has been established and the question is asked: Is declaring someone an innovator like declaring someone a disbeliever or an open sinner, meaning does it require establishing the proof?

The Shaykh : Yes, yes. Every defect attributed to a person requires that what necessitates this defect be established, meaning what obligates this defect. As for describing everyone as an innovator and everyone as misguided without evidence, this is not permissible. Yes.