[majewsky]

"Ignorant" implies that they are actively avoiding this information. A less inflammatory choice of words would be "unaware".

For instance, it is extremely silly to consider non-Americans "ignorant" if they don't know US-only programs.

[icepat]

No, it does not imply that. Ignorant simply means "lacking knowledge". You're implying the separate term "willfully ignorant" means the same thing as ignorant. If it did, then willfully ignorant would be redundant, which it is not.