First,  Trump was brought up in the 1950s, not the 1930s.
To the point,  climate change deniers care only about their and their fat cat buds' wallets, not anything that resembles the greater good.  And, in typical Republic party fashion,  they favor ignorance,  not knowledge. They're sure that science is either overhyped or worthless: "all  we need to know is in the Bible."