It could be that they were raised up to believe that such things are not proper in their lifestyle, that other peoples opinions gave them a pre judgemental view of the show, that they are to ignorant to give the show a try, that they cant get around the fact that My Little Pony seems like a 5 year old girls show, or that they have given the show some thought actually watched it but just cant connect with the story or its characters (some of my best friends are in this category and they respect me and accept that i like mlp) Its different for every person out there.. but keep in mind that its not always their fault because like i said they could have been raised up that way.