What are the units used to evaluate objective morals? Who invented the scale? Why do materialists think that anything that cannot be measured or grasped by our five sences can't be real. David Hume once said "If we take in our hand any volume of divinity or school metaphysics, for instance, let us ask, Does it contain any abstract reasoning concerning quantity or number? No. Does it contain any experimental reasoning concerning matter of fact and existence? No. Commit it then to the flames, for it can contain nothing but sophistry and illusion."
Human Intelligence: David Hume There is only one problem his statement fails it's own test. The unbeliever wants to subject everything he doesn't like to a standard so high that it will die the death of a million qualifications. However if he likes the ideas like: Beauty, love, worth..... then face value is good enough. I do not know how you would measure an abstract concept using materialistic methods and I do not care. It is philosophy that must be used to discuss this topic.