Happer is a climate conspiracist as Trump is. As Trump claims to be a stable genius, Happer claims to be one of the few really honest scientists in the world who believe we need more CO2 in the atmosphere, and who knows climate science is a hoax.
Trump and Happer know climate science is a hoax. Remember The Oregon Petition?
Many of you have probably heard of Ron Paul’s recent statement in Congress regarding a petition signed by thousands of scientists claiming that there was no scientific evidence for anthropogenic climate change, no evidence that burning hydrocarbons was harmful, and, in fact, evidence that burning hydrocarbons would be beneficial for the Earth. The purpose of this statement was to persuade the American people to reject the cap-and-trade bill being negotiated in Congress. https://investorshub.advfn.com/boards/read_msg.aspx?message_id=39464630
Happer signed it.
1998 – 2008 Will Happer is listed as a signatory to the Oregon Petition. [57] According to the Associated Press article, the Oregon petition included names that were intentionally placed to prove the invalid name collection process. The Oregon Petition has been used by climate change skeptics as proof that there is no scientific consensus. [58], [59], [60] https://www.desmogblog.com/william-happer
That's a big one containing about all we could want to know about Happer's past. The quote you picked out is in there.
"'The demonization of carbon dioxide is just like the demonization of the poor Jews under Hitler,' said... William Happer, who serves on the National Security Council"