Jesus is come in the flesh!

Some great points I've heard from a teaching recently about the bible:

- The bible has a pre-recorded response to every cult (or deviation from the truth) that could ever be imagined!

He gives and example or two such as -

There are answers to the Mormon's (Latter Day Saints) in Galatians 1:8:
But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.
- The angel Morani gave Joseph Smith a gospel message different to the one Paul preached...

And this scripture deals with Gnosticism, Doscetism, Prederism (Jesus already came in AD70) as well as Jehovah's Witnesses (who say that when Jesus resurrected was a spirit-being, and assert that He returned to earth in a spirit form in 1914).

2 John 1:7
For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.

is come in the flesh: present participle is used in the greek.
This baffled scholars because John wrote this after Jesus had already come, already resurrected, already gone to heaven but before he had come back.
So why is he using a present tense word here? You would think he would use a past tense or a future tense.
This is the same confession as in 1 John 4:2, except the perfect participle is used there, is replaced by a present participle. It is not clear why the author changed from a perfect particle in 1 John 4:2 to a present participle here; the perfect participle suggests a reference to the incarnation, that is the past. The present participle would suggest a reference to the future second advent.

In short, what's being said is - anyone with a story of Jesus coming "not in the flesh", such is a deceiver. The present participle suggests an ongoing and unending action.
- So, this could refer to when He first came to earth as Christ - if you say that when He came to earth He was a Spirit-Being, you're the deceiver.
- If you're saying that when He came to earth in His resurrected state as not in the flesh, you're the deceiver.
- If you say that His second coming either was or will be in a Spirit, non-flesh form, you're the deceiver.

This absolutely crushes all the Jesus was/is a spirit-being arguments.