It would also be literally illegal for Facebook to have not done this. They were given a legally binding warrant.
If you honestly would personally go to jail rather than comply with a warrant, that speaks pretty highly to your credit, but I don't think most people would find Facebook to be particularly culpable here. Facebook Messenger does actually offer an encrypted messaging service that, to my knowledge, has never been turned over to law enforcement because it is technically impossible for them to do that. That isn't the default setting though, and it's unfortunate that the people involved here weren't aware of it.
Just to be very clear, these laws are reprehensible. However, my anger is largely reserved for the politicians and voters responsible for them. It's a pretty big ask to demand someone personally risk jail time by refusing to comply with a valid warrant.
wagesj45