I strongly disagree with your contention that the majority of the tech-world is left-leaning in their politics. I have met many libertarians and conservative tech-workers in my almost eighteen years working in development.
I bet it's part of where we had our experiences. In Germany, it's almost exclusively leftist. It doesn't get in my way, because I care about the technology and don't think politics have a place there, but many people do strongly put both in one bin (if you allow me, I noticed that these are mostly people who do not really shine with their code contributions and want to "contribute" in other ways instead of improving their skills).
Moving from Madison, Wisconsin, to here was a bit of a shock. There are nerds around here whose geeky obsession is church. When I vote, many of the offices are simply uncontested, with just the (R) candidate appearing on the ballot. And even the Democratic candidates--when they even appear--may be more conservative than Republicans from more liberal regions.
Of course, as a libertarian myself, I don't feel much more disenfranchised now than I felt when I was surrounded by hippy-dippy liberals.
