Christianity is blind to the fact that most Christian holidays occur near or on Pagan holidays. These days were chosen to help convert existing Pagans to Christianity as they coincide with existing holidays and, therefore, provide minimal interference with traditions already established.
Christianity is blind to the fact that many (many) other gods share similar characteristics, stories, etc., with Jesus and/or Yahweh. In fact, a number of pantheons or belief systems pre-date Christianity by hundreds of years, yet have very similar beliefs in terms of history and progression. For example, see Zoroastrianism. Even the Greek gods share many pantheon similarities to God, Jesus, and various aspects of Christianity.
Christianity is blind to the concept of the word “theory.” For those who are uninformed or unaware (but willing to listen), theory in a science context relates to an understanding that has been proven to exist or has failed to be refuted. As an example, gravity is only a theory. However, there has been nothing to prove that it is not accurate with certain very specific exceptions. Likewise, the theory of evolution has been proven many, many times in many ways to be correct. Yes, there are gaps that are not yet explained, but to say that “God did it…” actually makes you look like an intellectual dunce rather than an enlightened believer.
Christianity is blind to love. While brotherly love is a core concept (it seems), this generally applies only within the context of other Christians and has little to do with those outside the Christian faith.