Mahdi and the Christian Antichrist

Can someone verify these characteristics about the Mahdi , here is a Christian claim "" In broad terms, what the Bible says about the Antichrist are the same attributes as the 12th Imam, or Mahdi, in Islam’s writings. Here are some of the main similarities (there are more): Spiritual world leader (Revelation 13:8) Rides on a white horse (Revelation 6:2) Seven year covenant/treaty (Daniel 9:27) Global seat is on the Temple Mount in Jerusalem (Daniel 9:27, 2 Thessalonians 2:4) Beheads non-believers (Revelation 20:4) Will the Mahdi reappear, unite the Sunnis and Shias, and establish a Caliphate? Will he be the foretold Antichrist? Time will tell, but the case is rather uncanny and compelling." Can someone respond to these claims