Jeremy Corbyn is an anti-semite. Julian Assange is a rapist, a Russian agent and a terrorist. Donald Trump is an anti-semite, a rapist AND a Russian agent. Vladimir Putin wants to invade and enslave the entire western world and to that end employs Assange, Trump, maybe also Corbyn(?), as well as thousands upon thousands of hackers and murderers who make people vote for whoever Putin chooses, and poison former Russian agents on western soil.
These allegations, and there's many more of them, have a number of things in common. Most importantly, they serve to change your mind. They serve to change your perception of reality. They seek to whip up your support for the very people and forces that launch them into the media.
Something else they have in common is that none of them has ever been proven, even though some of them are getting on in years. But they were never meant to be proven, simply because they don't have to be. If your mind is a fertile breeding ground for such allegations, all that needs to be done is plant a seed, and plant another, and then water them day after day by repeating the allegations and make them 'yummier', until they sprout a plant or a tree 'spontaneously'.
Comment: It seems to get a job in the police these days you need to be a coward and a sadist: