The term "more backstabbing" is a rather strong phrase that indicates a level of betrayal or deceit that is beyond what most people are comfortable with. However, there are several synonyms that could be used to convey this sentiment without such extreme language. Words like deceitful, treacherous, double-crossing, disloyal, and perfidious all express a sense of betrayal or deception in a less inflammatory way. Additionally, terms like two-faced, snake-like, and manipulative can also be used to suggest that someone is not to be trusted, without resorting to the use of more extreme language. Overall, there are many ways to convey the idea of backstabbing without resorting to such a strong phrase.