An example of what i mean:

Crippled -> handicaped -> disabled -> person with disability.

They all essentially mean exactly the same Thing. They all where the proper terminology at some point in time. But the emotional effect is different.

Also some political examples:

Global-warming and climate-change. Pro-life and anti-abortion

I assume most people are smart enough not to let Terminology cloud judgement but we are talking about the kind of people who read and believe the stuff like in the book above.