You are totally right in saying that politically right leaning Christians often are against any warnings concerning climate change.Ironically it is the apocalyptic belief of Christians that lets some keep on polluting with arguments like "Jesus is returning soon anyhow, so climate change will be irrelevant then".
It's the "no future" mentality that is part of Hitchens' critique.
That's a bitter irony for any Christian who does not subscribe to mantras from right wing politics, I think.
BTW, I left one board because my posts were getting censored in a debate about environmentalists.
I know what you are talking about.
However, I've been on two big Christian discussion boards challenging climate change denialism, and this wasn't the argument brought forward against warnings concerning climate.
They often cite Job 38:11 and the likes.