Well the biggest problem is arguing how Hitler was objectively wrong if there's no objective standard to base it on.
Every time someone with moral relativism attempts to make a check-list for what determines good/bad behaviour (societal agreement, evolutionary standard, morality developed over time and built upon etc etc) there's always
1. Multitudes of situations where the check-list was met by a group/society/and the actions were immoral
2. Multitudes of times when our own society does evil things yet justifies it through word-play (eg/ murdering babies for being inconvenient to someone whose disinterested in parenting = providing healthcare to remove clusters of cells because what if a woman was raped or something?)
Ultimately it all then comes down to 'My preferences say thats evil but if they did my evil thing instead it'd be ok...because I dont personally think its evil'
Also the biggest irony is that several of the people who attempt to argue against my point on imgflip are objectively known liars who disable comments and attempt to get people censored. Go figure
Caption this Meme
