You may consider it a "cult".  That is certainly your right.   Many people consider Christianity - or at least some sects of it - to be cults.

The thing is that we are blessed by the First Amendment:

***Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.***

http://www.billofrights.org/

To treat any one religion as a "cult" while not treating ALL religions as "cults" would violate the Bill of Rights.

There is no "ruling religion" in the US.

We also have laws which require reasonable accommodation of religion.