No, Nutella is not safe for tree nut allergies. It contains hazelnuts, which are a tree nut. There's a high risk of cross-contamination with other tree nuts during processing. Individuals with tree nut allergies should strictly avoid Nutella due to the presence of this allergen.
While food manufacturers generally follow good manufacturing practices, Nutella's production process cannot entirely eliminate cross-contamination risks for all nuts. Since it contains hazelnuts, the facility is not nut-free. There's always a possibility of trace amounts of other nuts if shared equipment is used. Consumers with severe allergies should exercise caution and check labels.