I think, in the case of one particular person, it is willful and/or feigned ignorance. Nothing better to garner attention than to take the opposite side of most other people. Then the crap hits the fan. Another of the same ilk posts, they high five or commiserate with each other in a pity party of 2. The thread spirals to a thread about the two of them and nothing more. That's why I usually don't bother. It's not worth the grief.
If I met someone
like that ignorant in real life, I would avoid them.
*edited to fix my ignorant mistake in grammar.
