What fed citizen? He's not Tyler.Both L'Rell and Voq at the least, are guilty of assault on a Federation citizen and upon a Starfleet officer. Saru allowing L'Rell to suppress/kill Voq can be viewed as Saru protecting a Fed citizen and Discovery crew member which is Saru's sworn duty. Saru had no duty to protect an enemy attacker. Further, it could allso be argued that Voq was responsible for Culber's death which was another reason to allow the exorcism of Voq.