As much as some people, even very important people in high governmental positions believe that this is a nation essentially created to favor the Judeo-Christian heritage of those that first came here from Europe, we find that the Constitution of the United States of America does not second this assertion, but rather through its First Amendment as first brought forth from the pen of James Madison, this is a nation that doesn't just tolerate all religions, and certainly therefore does not favor a particular religion, but insists upon the people having the right to be true to their conscience and thereby has written into its Constitution, that this nation supports the free exercise of religion, above all, for everyone.
This presupposes that a lack of toleration, and therefore the restriction of the people's right to the free exercise of religion, is clearly against its Constitution, has no place in America, and never will. So then, this makes America the bastion of not just being able to freely exercise one's religion, but that in doing so, this must be supported by the highest law of this land, its Constitution, and those that do not, are those that have violated that Constitution.
Perhaps it can be said that some religions, or the sects of certain specific religions, seem to be a clear and present danger to this nation, but to the degree that those that act upon their beliefs are in violation of specific laws, regarding, for example, violence or things of that basic sort, will have to answer to that law, for the free exercise of any particular religion does not carte blanche provide that person or institution with the right to subvert laws so written for the protection and benefit of the people, at large. In other words, while we do have the right to the free exercise of our religious beliefs; it needs to be acknowledged that those who commit acts that are detrimental to the people of this nation and thus in violation of written law will have to fairly answer for their actions.
Each of us should be forever grateful that our conscience is ours to own, and thereby makes us sovereign individuals that are not forced by this government to adhere to a particular religious belief that would violate that same conscience. While it is true that some people may be offended or annoyed by those that have different fundamental beliefs about certain things, this then is something that they cannot themselves do anything about; rather, they are restricted in enforcing their belief system upon another, though they are entitled to proselytize whatever it is that suits their fancy, to those that may have an ear to listen.
What makes America great is the fact that the people are entitled to freedom of conscience, and in that freedom to make choices and decisions that are in adherence to what they believe is consistent with their most precious beliefs, which this nation supports through its Constitution, which thereby permits its citizens to be free.