LGBT people are over-represented in IT, as it is less judgemental of such things compared to many other professions. Also, people who had to hide their identity, or question it, or read more about such hard to access topics, probably learned how to use the internet, and may have even developed an interest in fields like privacy and digital equality.

As for anime, Japan (and China, Korea etc.) are major electronics manufacturers and designers, so their culture has influenced the internet, and particularly the more nerdy parts of it.

But there are plenty of people with very different political views in the Linux community, from RMS's infocommunism to Eric Raymond's right-libertarianism.