Since we have become a modern society and have adopted the scientific way of thinking, is Christianity needed?

Western civilization may have been "built" on Judeo-Christian values (at least the "don't kill" and "don't steal" parts), but we have become a modern society and have adopted the scientific way of thinking. While the aforementioned values have indisputable merits, maintaining the dogma in its entirety is no longer necessary, especially when we consider the violence and segregation it has caused throughout the ages. Furthermore, philosophically speaking, Christian ethics are severely outdated. Since the Enlightenment, the Western World has seen far superior ethicists to Jesus of Nazareth. Kant and Mill, for example, created life-affirming ethical systems that can be applied to a wider range of people without destroying their culture or beliefs about where the universe came from and what kind of they should consider perverse. Truly, there is no reason to cling to the old way any longer. We have adopted science and reason in every other aspect of our lives... yet somehow we have retained Bronze Age ethics? It makes no sense. Why should we continue to believe it is better to be tribalists than to be humanists? This mentality is not compatible with a just, egalitarian society. Besides, Jesus may tell us to love one another, but he also says we should maintain the Old Testament in its entirety - no cherry-picking - which means we technically must condone , , slavery, and genocide (!). If we can do away with these parts (and we have), why not do away with the whole thing?