Howard's comedy often focuses on clever observations rather than vulgar material, and he typically uses humor to poke fun at himself as well as others, which helps to create a self-deprecating and relatable vibe. He has been known to touch upon controversial subjects, but he tends to deal with them in a playful and lighthearted way, avoiding unnecessary cruelty or gratuitous offensiveness.
It's important to note that comedy can be subjective, and what some may find funny might not resonate with others. However, based on the majority of his material and the way it's presented, Russell Howard is generally not considered to be rude in his comedic style.