Warming Linked to the Milky Way

Here's an article that descibes how any warming may be due to the Earth's position as it travels through the Milky Way. Read this. To me, it makes more sense than the greenhouse gas theory that liberals are pushing. It also makes me wonder just why liberals would be pushing so hard for one idea over another. Could it be that the greenhouse gas model serves the liberal purpose of wealth re-distribution? Could it also be that because the Milky Way model doesn't serve that purpose, it is considered heresy? It kind of makes you think, doesn't it? Anyway. here is the article:

"But new research suggests the coming and going of major ice ages might result partly from our solar system's passage through immense, snakelike clouds of exploding stars in the Milky Way galaxy. "

http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2005/07/25/MNGCIDSL4R1.DTL&type=science