That's not entirely true. Post-modernist reject the notion of a grand single narrative of society that everyone must follow, for examples; science is the future, Islam is a terrorist religion, western societies are superior to the rest of the world due to it's technological advancements, there's no solution to the debt crisis so we must believe our leaders and accept recession, we need petrol to survive and it's important for us to function as a society and we don't have an alternative. All these narratives commit fallacies of orientalism that modernist suffer from.
Basically modernist get swept with the times and contemporary ideas and beliefs, they are heavily influenced by media outlets and corporate elitists. They don't have good understanding of truisms.
Post-modernist see the answers in not just modernity but in the past history, culture and religion. To say we reject objective reality is not entirely true. Subjectivity is just given more respect.
Um... your very discourse is antithetical to your stated position. It's all rather clumsy post-colonial rhetoric, not post-modernism. Abandoning all meta-narratives, including your faith, into a realm of relativism and non-identity is post-modernism, you're just disaffect with Western Civilization but lack the cogent understanding of the critical philosophy your representing and thus claim the null position erroneously.
Also modernism doesn't have anything to do with corporate elites, it's the evolution of the Enlightenment philosophies, one that expressed less certitude on the absolute nature of human consciousness - the Enlightenment's core value.