What does Christianity, fundamentalist or otherwise, have to do with it? If you believe that God created the world basically as it is, you should be at least as apt to favor legal pot as if you don't. Lord knows there are a lot of hippie-like Christians who feel that way.
It's Islam, not Christianity, that forbids intoxicants, part of its whole theology of complete submission to God. Judeo-Christianity is far more interested in sexual purity than in avoiding intoxication. Wasn't Jesus' first miracle turning water to wine for a wedding party?
Actually Islam revels in hallucenogenics such as the marijuana deriviative hashish. Alcohol is banned in Islam.
Another "religion" that revels in marijuana is Rastafarianism. A religion whose dogma about white people is just as racist as the kkk.