It’s not the scientists.
It’s the media.
It’s always been the media.
Think about it... Scientists don’t produce the articles we read or the TV shows we watch; the media does. In the real world, most scientists work for a living (often for an “evil” company like Exxon or BP or a “greedy” pharmaceutical or chemical company—Monsanto, ADM, etc) and are not liberals. If anything, they’re more likely to be slightly conservative, since logic rules their world.
The media is the ones who report this nonsense—not scientists.
Conveniently, the media is utterly clueless. They have a relatively small handful of activist “scientists” feeding them this rubbish and have no idea or ability to read the other side.
It's the scientists - the tenured, think tank, opinion writing, policy churning out social engineering gray pony-tailed scientists and their "message" is amplified by the MSM.