"We simply cannot avoid it [good and evil]"
If by "we" you are referring to much of the Western world and what I assume you are most familiar with, then yes, you are correct, and we have made ourselves that way. However, if you look at something of another nature like Daoism, which can be applied as either a philosophy or a religion by the way, you might find that many believe good and evil to simply be part of life and that, no matter how one lives life, one will be both good and evil. This does not discount the idea of good and evil; rather, it simply accepts both as fact rather than forcing oneself to bind to the goal of always doing good and avoiding evil at all cost.
"Everything can be a 'that'; everything can be a 'this.' Therefore, 'that' comes from 'this' and 'this' comes from 'that' - which means 'that' and 'this' give birth to one another. When there is no more separation between 'that' and 'this', it is called being one with the Tao."
Chuang Tzu, a Daoist sage, said this in order to convey the idea that everything, particularly opposites, spring from a common well of being. This is the philosophy of yin and yang, and in Daoism, life is both yin and yang - good and bad (or evil). Rather than avoiding evil, yin and yang allows us to embrace both good and evil and determine the quality of our lives based on how we respond to such things instead of whether or not they simply exist in our spheres.
"Also, a philosophical claim and a religious claim are the same thing."
Hardly. As I said, and as you said, they are tightly related. A philosophical claim, however, is largely objective. It is reached through logical means, rationality, and through one's own education and discussion of the matter. Religion, on the other hand, is spiritual. It is inherently a guiding force in one's life, and within it are a number of philosophical claims, typically reached by the scholars and leaders of that respective religion, which serve as the underlying principles behind that guiding force. Maybe a more appropriate analogy would be a square and a rectangle. A square is a rectangle, but a rectangle is typically not a square; however, it can be. I'm sure you have heard that before.