Two facts/links to support your argument (probably you know them already):
– Climate Change has been the preferred term of right wing propagandists (Frank Luntz) because it sounds less dangerous than global warming: They didn’t change the name from ‚global warming‘ to ‚climate change‘.
– Concerning Naomi Seibt: About her relationship to the Heartland Institute see: Exposé Shows Rise of Heartland Institute’s Climate Denial Efforts Overseas, Using Dark Money and a YouTuber | DeSmog.