Problem with "Left Behind"?

I know this is off subject. I'm not quite done reading all my verse on joy. The family has been under the weather lately. I found these verses in 2 Thessalonians and felt they were important enough to share even if they are off topic.

2 Thessalonians 2:10-12, "Even him, whose coming is after the working of Satan with all power and signs and lying wonders, And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved. And for this cause God shall send them strong delusion, that they should believe a lie: That they all might be damned who believed not the truth, but had pleasure in unrighteousness."

Strong words and ones I have never looked closely at before. In the "Left Behind" series my favorite parts where when people came to Christ but these verses clearly state that those who heard the truth and denied it will have past their opportunity for grace. I always wondered, how on earth could people still not believe after the rapture happens just like we have been saying it would? Anyone who ever heard a Christian tell them about this upcoming rapture would have to be saved at this moment. You just couldn't deny it any longer. These verses clear that up. It is a sad fact, but those of you out there who are thinking, "Well if all the Christians disappear one day, then I'll believe." must realize you cannot count on this. The time of the rapture will be like death to some, no turning back.

"But he answered and said unto them, An evil and adulterous generation seeketh after a sign;"(Matt 12:39) Seek Him before it is too late.