Trickery is just that powerful...and the trickiest part is to make you feel it must be right and if anyone tries to tell you its a trick or it's wrong, they are at one with satan, so ignore them and carry on....trick??
( not yelling on the CAPS word - knowing... just laying the emphasis)
Well, I think that the Epistles and the Gospels stand firm on, at a minimum, four issues: The Divinity of Christ, The Humanity of Christ, The Death of Christ, and the Resurrection of Christ and how they relate to the Gospel mankind's salvation. (JESUS means GOD IS SALVATION)
Those that have misled people in the past and continue to usually give variations or relegations to at least one of those four issues. For example, say that a man said that Christ was not a human, but only a spirit. What that means is that Christ didn't suffer for our sins, that no punishment was truly given, and that we are not truly saved from our sins. It also discredits God's creation of the flesh, counting it as though it did not matter or was never good (making God out to be a liar.) Simple disagreements with the Gospel can have eternal implications. Antichrist's who mislead people with doctrine don't only lead people to temporal peril, but spiritual peril.
Many of the antichrist's that Jesus spoke of were a danger in one of those two ways. Jesus warned His Apostles that they should not follow men who claimed to be political Christ's, because they would have led them to shelter within Jerusalem in 66 CE, get slaughtered by the Romans in 70 CE, and stop the spread of the Gospel of mankind's salvation through the generations. See?