We should not be surprised. This is spiritual warfare. Read Ephesians 6:12. The people buying these ads are simply being used by the enemy. We must make sure we continue to proclaim the gospel; God the Son left heaven to become a man, to be born of a virgin in a barn, live a perfect life as a model for us, be crucified as a substitution for our sins, was raised from the dead, and ascended back to God the Father in heaven to intercede our our behalf.
Luke 2:11 For unto you is born this day in the city of David a Saviour, which is Christ the Lord. Isaiah 9:6 For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace. <><