Some years ago, on an email list populated by professionals, I came out as a fan of free markets. The immediate response was that I must be an objectivist, a Randite. And that, apparently, would have been okay. But when I insisted I was not, that her philosophy seemed to me immoral, I was suddenly shunned.
When the left shows itself so intolerant of the right, it is not “capitalism” or any sort of economic policy that bothers them. It is the hint of a moral order. This is why so much of leftist politics is about sex.