If Christians hate other cultures why did they steal so many ideas including the 25th of december from others?

The Christians stole the Nativity scene from Indian God Krishna, the teachings of the Buddha as well as "Walking on water/ performing miracles and rising from the dead all well doented in Buddhism -- the look and birth date of Mithra -- the breaking of bread and drinking wine from Osyrus and the resurrection BS from Apollonius. Yet Christians sy they are the one true path. How does this make sense? Anyone who disagrees can watch theologian Dr Robert Beckford's videos on youtube for IRREFUTABLE proof that I am correct.