I'm not calling everyone who has a gun a gun worshipper, but I very much, along the lines of Spencer W. Kimball's "The False Gods We Worship," see the relationship that the most ardent gun-advocates have to their weapons of death as idolatry. If a person's response to yet another school shooting is a callous and unwavering appeal to their interpretation of the second amendment that would allow for no regulation that might save future lives, then, yeah, they are idolatrous gun worshippers.
If that hurts their feelings, oh well. My first amendment right hurts them far less than their love of the second amendment has done to these children.