What I said was they were not forced to stay. I've read a number of history books, and what forced labor is is very clear. Besides, when one comes to the US on a Visa one chooses to accept the terms, and they do not include a guarantee of lifetime employment.
What I actually believe in is freedom and individual rights, and my posts are consistent with that. At least I hope so!
As for D, it is Boost licensed. It is the most free license I could find. You can do whatever you like with the code, as long as the copyright is included. (I would have made it public domain, but that isn't recognized in many countries.)
Each member of the D community has their own reasons for contributing, and many (myself included) do not receive any compensation. It's just our gift to you and everyone else.
It is your right to use it, or not, as you please.
P.S. The D Foundation also discourages politics of any sort in the discussion forums. I don't even know what the politics of the other contributors are. It's not relevant.