i have come VERY close to deciding to write a f***ing book on this topic. SERIOUSLY! this topic is just WAY too deep for ANYONE to ignore. hitler believed he was doing good, while the rest of the world believed he was evil. IMHO, morality is perception. i feel killing everyone on earth is good, while almost everyone else will think its evil (being serious too). humanity is a cancer that only special genocide can cure. (not types of humans, but humans in general)
I agree that Moral Judgements are usually if not always influenced by perception.
However, should we exclude the concept of objective moral truth merely because moral judgements are subjective?
the way i see it. moral truth is simply what the popular opinion is of an area and era. when in complete reality, this is not the case. moral truth is a constantly changing idea that cannot and will not settle on any set of guidelines. in 100 years, unprovoced murder might end up being socially acceptable. while that example is pretty far fetched, it still holds some truth. it all ENTIRELY depends on the common knowledge and mentality of those in power. and power is usually derived from popularity.
You appear to have contradicted yourself in your first sentence.
"moral truth is simply what the popular opinion is of an area and era."
If this is true then whatever the popular opinion are is what the moral truth is.
If this is true then it is moral to follow the popular opinion.
If popular opinion includes rejecting authority then it is moral to reject authority.
Popular opinion is an authority.
It is immoral to not reject popular opinion.
It can be both moral and immoral to follow popular opinion.
Something cannot be morally permissible and morally impermissible.
There is a contradiction.
Contradictions imply a premises or a step in the argument is flawed.
The premise "moral truth is simply what the popular opinion is of an area and era" is flawed
Therefore Moral Truth is not derived from constantly changing Moral Judgements nor from social acceptability.
PS: We are also speaking about what ought not what is. Might is thought to have little to do with Right.