There is this trend in online postings that I've only noticed recently with Trump and Brexit. Accounts come with huge walls of texts that always start with "I used to be super pro-EU/hippy liberal" but then they did their own research and found out that EU are actually mafia that eats babies and liberals are all pedophiles - opinions which are so out of the mainstream line of thinking that it's quite clear that they've never shared pro-EU/liberal values in the first place.

Is this "I use to be like you but then I saw the light"-sort of post effective at persuading people?