I am not sure what parade Christy White was watching, but there was no "sexuality" on this float. What I saw was a bunch of kids with rainbow flags dancing around and smiling and wishing people a merry Christmas.
The parade committee is not going to allow any group, gay or straight, to have naked people on floats!
As a mother, if one of my kids was gay I would be happy that he had a peer group in which he could feel accepted and comfortable in.
As for this being a family event, families come in many different packages, not just the one defined by you!