Objective Morality, Anyone?

[tor]

This whole objective vs subjective debate is going on in order to safeguard morals from relativistic fuck ups. For instance burning people alive is wrong and should be very very wrong so that no culture would consider it right.
Because if objective morals don't exist and there are 2 continents one burns people alive and the other does not what is the non burning continent gonna say to the burning one? That it's all subjective and a matter of opinion? Fuck that shit.

Sadly, burning people alive goes all the way back to Old Testament times. The Israelites generally preferred stoning to death, but there are a few "crimes" for which burning was prescribed—if I remember rightly, fucking an animal was one of them, and both human and animal were to be burned to death.

What this goes to prove is that cultural conditioning (deciding what God wants) can overwhelm the evolutionary foundations of morality, such as empathy and a sense of fairness (punishment proportioned to the offence). I mean I feel that having sex with an animal is slightly creepy, but burning alive?????

If morals are subjective what arguments you gonna propose against lets say bullying? Bullying comes from evolution.
Lets say there is a continent on which bullying is considered fine thing. How are you gonna argue against it?