Obama is not THE Anti-Christ (singular) but rather one of many anti-Christs (plural). Big difference.
"Children, it is the last hour; and just as you heard that antichrist is coming, even now many antichrists have appeared; from this we know that it is the last hour." -1 John 2:18.
The latter are individuals that demonstrate the spirit of antichrist in their behavior opposing God's kingdom, God's morality, God's truth, and sound doctrine. They precede the Anti-Christ "whose coming is in accord with the activity of Satan, with all power and signs and false wonders." 2 Thessalonians 2:9.
So what those of us educated in Christian eschatology are saying is that Obama is an anti-Christ not THE Anti-Christ.
Understand?
When I see an image of Obama standing in a Jewish Temple blaspheming god I just might believe you.