The startup scene is primarily young, white and male. It isn't all that surprising that Trump has support among the startup scene. American tech workers are also particularly vulnerable to outsourcing and have suffered from the H1B program.
It's an Internet thing. The Donald Trump subreddit on Reddit is extremely popular, I'm sure a bunch of them have moved over to this thread for a moment.
I'm going to say this - I think Trump supporters are definitely more vocal/outspoken. Kind of skews the response.
If you could see upvotes on comments here, I think you'd see a more accurate picture of support strength.
Among some. Doing a startup isn't really a partisan issue.