Antichrist – Historical famous people warned you!

Is Antichrist already here and has he infiltrated the church? That was the main view of many different denomination.. now strangly the same denominations have changed their understanding to that once presented by the very power their forefathers warned against. Are the christian world today being fooled by the Antichrist? Did the Antichrist plant the idea of the 3,5 years with an Antichrist in the end days?