Christianity is false because of its source and its concepts. It's much easier to see the falsehood of Christianity from its origin than from its philosophy because the philosophy is very subtle. Many ideas in Christian theology were borrowed from Judaism and then distorted. The source of Christianity comes from the experience of two or three people who said there was a man who arose and he created a new religion. When it first started, it was the belief that Jesus was a Mashiach and a cult was formed around this concept. Later on, this became much wider and began to be built around a new cult that believed that not only was he the Mashiach, but also an aspect of G-d. The experience of one man which is open to question cannot negate the experience of an entire nation which is not open to question.