People were accusing him of being a pedophile because redit removed a subreddit that was involved in a conspiracy falsley accusing other people of being pedophiles. He changed the attribution of the accusation to be against the people doing the brigading.
Quoting from Reddit Help: Will you remove something defamatory about me or my friend? [0]:
The best way to deal with incorrect information on the Internet is to post
the correct information next to it. The reddit community is usually very
supportive of such a response, and will likely vote to give the correction
greater prominence than the original post. Redditors love a good
counterpoint.
Sure, but he should resign. Pizzagate is ridiculous, "spez is a pedo accusations" are ridiculous, but a CEO of a massive (user-wise) company silently and childishly editing their comments in a confusing way is also ridiculous.
From what I understand people on The_Donald subreddit were accusing him of being a shill, so he edited his name in those posts to be The_Donald's moderators instead.
If you had guessed stupid political garbage mixed with internet trolling, congratulations you get a cookie.
Actually the people on /r/The_Donald branched off and opened another discussion that led to the Pizzagate (accusing a restraunt owner, Hillary Clinton and others of being pedophiles). And when /u/spez deleted the Pizzagate stuff (people were actually harassing the restruant owner), the mods started abusing and accusing /u/spez of being a pedophile.
And also take note that witch-hunting is prohibited on reddit and can warrant legal action.