Do Christians knowingly use dishonest and unethical tactics to spread their religion?

No, it's atheists who use the lowest of the low dishonest, self-deluded, and unethical tactics to spread their belief systems. You, just a few minutes ago, described twice how atheists should be allowed to do all the smearing they want because they are only responding to people--irrational and untrue all at once. So, therefore, dishonest of you. Aren't you an atheist, and there you were, using dishonest and unethical tactics to smear your belief system onto others.