That's obviously a strawman. A relative morality doesn't claim that 'truth' is relative, it claims that the concepts of 'good' (morally acceptable) and 'bad' ar

That's obviously a strawman. A relative morality doesn't claim that 'truth' is relative, it claims that the concepts of 'good' (morally acceptable) and 'bad' are relative. Thus when saying morality is relative it's not that we say that the factuality of "X is moral" depends on your setting, but that the statement makes no sense unless you specify what morality you mean, because "moral" just means "acceptable in a given morality system".