In this context, I think the term 'ignorant' seems likely to be employed to convey a repugnant belief rather than a state of overall lack of knowledge. Replace

In this context, I think the term 'ignorant' seems likely to be employed to convey a repugnant belief rather than a state of overall lack of knowledge. Replace 'ignorant' with 'climate change denialism' or whatever belief you might find abhorrent.