Tech has a lot of libertarians, which vaguely attribute to a couple of things: the appeal of simplistic but clean-seeming free market economic models to kinds of people who are drawn to computers and (to a lesser extent) the influence of startup culture. People in tech are also typically pretty economically secure, which gives them the luxury of a certain amount of aloofness.
That's pretty easy. It's because tech has a vocal arch-conservative contingent.
Why are there so many arch-conservatives in tech? I don't really have an answer to that.