as a person that came from the 3rd world country and new in fediverse environment, i genuinely would like to know about this.
edit: thanks for the replies! sorry, i literally don't know the reason since i'm not a western lol. twitter/x is too biased especially when musk openly supports trump so i came here and seeing fediverse is mostly are harris or biden (when he's still up for the candidate) supporters. don't know about reddit tho, i only use reddit as a forum for linux and programming stuff.
You either refuse to acknowledge all the terrible things he's done, or you approve of the things he's done.
People who refuse to acknowledge, are going to look at all the "fake news" on this site about His Oranginess, and quickly decide that it's nothing but propaganda and go somewhere "more reliable".
Those who agree, stick around a little longer. They will argue and defend the horrible things, because they think there are more like them that will come out and back them up as a fellow defender of racismmisogynyhomophobia "Good old family values". But they will be downvoted to oblivion and have trouble finding a friendly voice. Eventually, they too will go where they can have a more comfortable discussion with people who are as terrible as they are.
And ironically enough, if you went to Truth Social, and asked why there weren't more Biden/Harris supporters there, they'd give you the exact same answer in reverse.