The LDS missionary entry received by far the loudest applause from the parade attendees. I have been critical of religious groups which use parades as an active mode of proselytizing. LBGTQ groups in past Park City 4th of July parades have passed out small pride flags to kids, for example. Religious groups, including LBGTQ, in parades are fine. Using the parade as a pretext for proselytizing is not. The equivalent wrong (to Park City) in today's Provo parade would have been, say, missionaries passing out Books of Mormon to the parade goers, which didn't occur.