There is undeniably a bias against Christianity and Christians in the United States in terms of criticism. It's acceptable to mock and criticize Christianity to a degree and in ways that would be unacceptable toward any other religion, in particular Islam. No doubt in my mind about this.
Although many of his contemporaries disagree, Richard Dawkins has lead the charge for public contempt of theists in general:
I agree with Dawkins in that theists and Christians in particular should be prepared to defend their faith, but Peter noted this same thing 2000 years ago....as believers we're called to do so.1 Peter 3:15
15 Instead, you must worship Christ as Lord of your life. And if someone asks about your Christian hope, always be ready to explain it.