Interested bedfellows, indeed, at the bottom of the thermometer?

Does "Interested bedfellows, indeed, at the bottom of the thermometer" refer to "Indeed, bedfellows who are sweet in their hearts are treated coldly"?

Context:

I know David. He’s a wonderful person and I know he’s just doing his job, but this is imprecise and, more importantly, unhelpful.
Let me start by saying that I have been the target of a great deal of hatred and mistrust as a result of my deconversion. I have an email folder dedicated to hate mail. I have lost friends and feel somewhat estranged from family. My ex-wife forbids my children to accompany me to my public lectures and other events. I get it. Atheists aren’t winning any popularity contests.

It’s also true that recent studies show that the public’s views of atheists are quite negative. A recent Pew Research Center study showed that Americans had the “coldest” feelings toward Muslims and Atheists. Interested bedfellows, indeed, at the bottom of the thermometer!

More:
http://www.patheos.com/blogs/yearwithoutgod/2015/03/24/are-atheists-the-most-hated-group-in-america/