I choose not to ignore anyone, at all, period.
What would be the point of a political forum if I ignored those whom I disagree with? Then it simply becomes an echo chamber of voices that agree with me, and that isn't something I want.
Somebody needs to grow up. Not everyone is a Seeker of Truth, open to new ideas and methodologies.
Incorruptible is a troll. His posts are designed to get a reaction. He will take something straightforward and mundane, run it through outre perspectives until he finds one that gives the most obnoxious conclusion, then post it, waiting for the troll bait to show up. After that, he'll just run his catch in circles, and there's nothing they can do to pin him down as his reasoning is à la carte.
He's not running by the same set of rules, and his rules allow him to remove the fulcrum from under any lever you have available. He will avoid agreement on any topic by bringing a greater weight of stupid than you do smarts, and will dismiss the validity of any negative opinions you have of him.
He gets what he wants by stringing people along. You can't make him do more than that because there is no emotional need on that side. To hold himself to a higher standard would actually interfere with his path to the fulfillment he gets from trolling. If he can get what he needs by being stupid, and he can shield himself from any negative emotions with more stupidity, why should he do the work of questioning himself? You might be of the opinion that, as an adult in a democracy, he has some moral obligation (and so should feel an obligation) to make sure his opinions are informed before voting to subject others to them, and that, "Everything that my brain shits out is gold because I'm a white 'murrican and therefore entitled to be right," does not contain within itself the path to utopia (even solely for whites); but how are you going to get this across to him? His system works for him within his narrow perspective, and it doesn't contain enough tools to lift him to a level where he might see its inadequacies.
You don't get points for being troll bait and autistically replying to every stupid thing that is said on the internet. Beyond a certain point you're even doing more harm than good, as you are presenting them with a reality where they can believe they are entitled to a tryhard reply (the dumber they are the more they'll have people jumping to tell them the errors of their ways), and so as the center of all this attention all they have to do is hone their defenses. So instead of learning how to properly seek out data and compensate for various biases to allow them to come to an informed opinion, they sit back and figure that if the truth of the incoming belief can't be forced on them by their opponent that the opinion they hold must be equally good. Having no way to objectively check themselves, they just get better and better at dismissing anything they don't want to hear, because that's what their system defines as success.
By taking him seriously you're just validating him within his system.
