Willful ignorance is the act of dismissing some evidence in light of other, unrelated evidence. 

Regular ignorance is simply dismissing evidence period.

I tend to find that vehement religious types tend to be more susceptible to regular ignorance, while vehement atheist types tend to be willfully so (while generally LESS ignorant than the regular-ignorant religious sorts). 

At the end of the day everybody who says anything about anything sucks, and is stupid, and I hate them.