Super tweeters are very likely narcissist, possibly psychopaths, if they are not actually a front/shill/bot. Think about the people in real life who always have to be the center of attention. Rarely you will find someone with a virtuous mission, who recognizes the power of a group. Most often you just find an emotionally damaged person who is trying to fill a hole.
Either these narcissists develop a cult of personality or move on once the narcissistic supply dries up. Twitter is just an endless supply of attention, and we all know the most divisive get the most attention. Do they want to be divisive? Maybe, but they certainly want the attention it provides and act accordingly.
Often the super-Tweeters will be people who literally have nothing better to do (eg, their time is worth very little), or who are being paid to do so one way or another, and all of the things that implies.
Remember that whenever spending your valuable time arguing on the internet :)
Either these narcissists develop a cult of personality or move on once the narcissistic supply dries up. Twitter is just an endless supply of attention, and we all know the most divisive get the most attention. Do they want to be divisive? Maybe, but they certainly want the attention it provides and act accordingly.