The biggest treat to the gospel, are false Christians. Have noting to do with them.

False teachers and false prophets who claim to know “Jesus” are the mockers who harm the true body of Jesus the Messiah.
Did you wake up on Earth 22nd of May?
Obviously. If not, you would not read this article.
What do do with those who proclaimed “Judgment day” on 21st of May?
How to relate to such “Christians”?
Jeremiah 14:14
the LORD said to me, “The prophets are prophesying lies in my name. I have not sent them or appointed them or spoken to them. They are prophesying to you false visions, divinations, idolatries and the delusions of their own minds.
Jesus told his followers that even He did not know the day and hour of His return.
Matthew: 24:35-36
Heaven and earth will pass away, but My words will by no means pass away. “But of that day and hour no one knows, not even the angels of heaven but My Father only. But as the days of Noah were, so also will the coming of the Son of Man be.
What shall we learn form this?
Do not base you faith on man made messages. Do not let them loot you, steal both you money and salvation. Read the Word of God, and believe what is written in the scripture.
Galatians 1:6-0
I am astonished that you are so quickly deserting the one who called you to live in the grace of Christ and are turning to a different gospel— which is really no gospel at all. Evidently some people are throwing you into confusion and are trying to pervert the gospel of Christ. But even if we or an angel from heaven should preach a gospel other than the one we preached to you, let them be under God’s curse! As we have already said, so now I say again: If anybody is preaching to you a gospel other than what you accepted, let them be under God’s curse!
Written by Ivar
Take a look at this special message from the one known as the Comforter in The End Times (John 14:16 and 14:26) to Harold Camping of Family Radio posted at :
http://merkaba.org/recent/052011.html