Buddhism is difficult to understand for many Westerners because its point of view is very Eastern. Reincarnation is taken for granted in the cultures where Buddhism thrives, and it is also taken for granted that suffering among humans is a given. Suffering, they teach, comes about because of ignorance. The point of Buddhism is to remove oneself, via contemplation and meditation, from the never-ending cycles of suffering in this world and reincarnation into more lives of suffering. A person who achieves this is called “enlightened.” Once this has been achieved, the enlightened one, or bodhisattva, goes on to help others leave the cycle of suffering behind, and also to help suffering people who are in immediate need.
Buddhism is non-theistic. Not atheistic - non-theistic. Meaning it neither endorses or denies any deity or religious system. That said, some world religions aren’t really compatible with Buddhism because they start from different premises even though they address some of the same concerns.
I’m sure plenty of people can quibble with this, but as far as I am concerned, this is it in a nutshell. Buddhism is not evil.