Yes, buying the "I know it all" from the duck made the achievement checklist (The chalice button) avaliable. That wasnt how it was meant to be, but sadly I ran out of time and that was my "easy solution". In retrospective I should have made the duck either free or based on the ammount of achievements instead of money. Do you remember how it crashed by any chance? Im doing some post jam balancing/fixing. If you don't thats ok, I totally understand.
About the white nationalists co-opting the crusades thing, thats the first time I heard about it! Im actually from south america so I dont know much about US or european politics. The crusader thing was just my take on the theme "you only realize the value of something when its gone" but you dont see that until the very end of the game sadly. Im really, really sorry you related my game with that, it wasnt my intention at all.
Anyway thanks a lot for playing and for your feedback!