> But does anyone else feel kind of betrayed/insulted that the project is not open source?

Honestly, I find it hard to comprehend how much entitlement your comment suggests. A game is a work of art for his creator(s) and it is their own prerogative if they release the source code or not.

I can understand someone that wishes a game to be open source for study or moding purposes. But insulted by a game that doesn't align with my political agenda/view is a bit too much.