GSS respondents were asked if a person who is against churches and religion should be allowed to speak in your community. Here are the percentages who answered yes listed by religious affiliation:
Agrees that anti-religionists should be allowed to speak (sample size = 33,069)
Eastern Orthodox 91.9*
No religion 88.7*
A majority in each group, Muslims included, is in favor of free speech. Most groups support it at a higher level than Protestants. Although not shown, Jews, Orthodox, and those with no religion have significantly higher levels than Muslims.
In results not shown, more religious people (i.e., those who attend services frequently) are less likely to favor allowing the person to speak. This was true of all religions except for Buddhists and Orthodox Christians (three cheers for the Orthodox). The link was by far the strongest for Muslims: religious Muslims are much more likely to favor censorship.