Al Gore compares those skeptical of man-made global warming to racists, abuse victims, homophobes

Is it reasonable to compare those who don't think that there is significant man-made global warming to those who support apartheid?  How about to those who are upset when two homosexuals hold hands?  How about to an abusive alcoholic father?  If the reverse was true, would people object?  From the Washington Post:

AG: Well, I think the most important part of it is winning the conversation. I remember as a boy when the conversation on civil rights was won in the South. I remember a time when one of my friends made a racist joke and another said, hey man, we don’t go for that anymore. The same thing happened on apartheid. The same thing happened on the nuclear arms race with the freeze movement. The same thing happened in an earlier era with abolition. A few months ago, I saw an article about two gay men standing in line for pizza and some homophobe made an ugly comment about them holding hands and everyone else in line told them to shut up. We’re winning that conversation. 

The conversation on global warming has been stalled because a shrinking group of denialists fly into a rage when it’s mentioned. It’s like a family with an alcoholic father who flies into a rage every time a subject is mentioned and so everybody avoids the elephant in the room to keep the peace. But the political climate is changing. . . .