> It is my opinion that it is not for us, as open source software developers, to decide whose views are valid and whose are not, and to allow or disallow project or conference participation as a result.
You really should not be in open source if you believe it is your purview to ideologically police the usage and contribution to your software. That notion is incompatible with the spirit of the endeavor.
"If you don't want to help create war machines you can't contribute" is your solution, not mine.
Historically the conventions of open source has been that use is completely without restriction, but there has always been conflict about that. The domain is new enough that I wouldn't consider it settled yet.
I know very many people who would refuse to work for certain companies and in certain industries — and have rejected certain projects — but would happily contribute to something MIT licensed that would end up in those systems anyway!