An Antichrist protector is someone that says "antichrist has not yet come".
It is clear from scripture that many antichrists existed already in the 1st century.
(I John 2:18 [KJV]) Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time.
When you hold the doctrine of futurism you protect Antichrist and you expose the church of Jesus Christ to being accused, harmed by the Antichrist. You are working for the enemy.
(Revelation of John 12:11 [KJV]) And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death.
Paisley shouted "I denounce you as the Antichrist!"
Someone that holds the doctrine that the Antichrist is a future thing to come and has not yet come is working for the Antichrist.
- Ian Paisley Wikipedia, https://en.wikipedia.org/wiki/Ian_Paisley