This inverted cross in a new home was obvious . For centuries mockery of the cross has been flaunted in homes' doors and windows . Businesses do this too . Christians understand the hatred for the cross that saturates advertising , business , education and social engineering . It is to be expected . Jesus forbids any retaliation other than exposing example like this . There will always be some excuse , such as it represents St. Peter's inverted cross , but there is so much antipathy for the real truth of Christianity today worldwide that symbolism like this can be smelled blocks away .