He’s doing it because Republicans control all portions of government, and are basically illiterate when it comes to logical thinking, possibly even reading too. It’s in the first paragraph(s) of the article:

The change shows how Mr. Gates is retooling his empire for the Trump era. With Republicans controlling both houses of Congress and the White House, Mr. Gates calculated that the Breakthrough policy team in the United States was not likely to have a significant effect in Washington, said the people familiar with his thinking. The U.S. policy team was also one of the largest and most expensive parts of the organization.

“Bill Gates remains as committed as ever to advancing the clean energy innovations needed to address climate change,” a spokeswoman for Mr. Gates said in a statement when asked about the cuts. “His work in this area will continue and is focused on helping drive reliable affordable, clean energy solutions that will enable people everywhere to thrive.”

And further down…

Instead of trying to influence policy, Mr. Gates is now focused on building clean energy companies through the Breakthrough Energy Catalyst program, Breakthrough Energy Ventures and the Breakthrough Energy Fellows, the people familiar with the matter said. Those efforts, which fund start-up companies and entrepreneurs working on a range of renewable technologies, were not affected by the cuts.

You guys gotta read the article before jumping to conclusions. That’s what Rs do, not what we do.