Question: profanity in dialog

[Dennis]

Reviews are coming in for our newest scifi thriller. Some are five star and no mention of the profanity. Some reviewers are put off by it, and focus on it and give it two stars. I would love to hear the opinions/experiences from readers, and from other writers, of using profanity with such characters as: navy seals, Russian thugs, and a foul mouthed lawyer.