I think much of the animosity began with the assignment of the label “preppers”, that was then adopted by those who plan ahead.
Labels are effective tools to dehumanize people, and even more so when they are associated with “hot button” descriptive adjectives, like “Doomsday preppers”.
Seriously, what conclusion could an objective person reach from a label like that, other than those people were weird and their beliefs were unsound? Don’t fool yourself for a minute into thinking that such labels are complementary.
So the first thing that “preppers” need to do to escape media efforts at attack is to dispense with the label, by adopting a new, neutral label. Just shunning all labels won’t work, because they will just continue to label you “preppers”.
Well, the label used to be “survivalist” and that had a bad connotation, so the word, “prepper” came along. Pick any other word and it will also become a bad label because it represents the same thing, us.