PreTrib Rapture

I just finished listening to John MacArthur's latest sermon, describing the dreadful events of the book of Revelation. He holds out the hope that the wrath poured on the earth is for unrepentent sinners and that believers will not suffer it--they will be removed first. And I can't argue that it is biblical to say that "God did not appoint us to suffer wrath but to receive salvation through our Lord Jesus Christ, but I wonder how he reconciles the teachings of Christ with a pre-trib rapture. Look at the scripture, for example:

Matt 13:24-30"The kingdom of heaven is like a man who sowed good seed in his field. 25 But while everyone was sleeping, his enemy came and sowed weeds among the wheat, and went away. 26 When the wheat sprouted and formed heads, then the weeds also appeared.
27 "The owner's servants came to him and said, 'Sir, didn't you sow good seed in your field? Where then did the weeds come from?'
28 "'An enemy did this,' he replied.
"The servants asked him, 'Do you want us to go and pull them up?'
29 "'No,' he answered, 'because while you are pulling the weeds, you may root up the wheat with them. 30 Let both grow together until the harvest. At that time I will tell the harvesters: First collect the weeds and tie them in bundles to be burned; then gather the wheat and bring it into my barn.'" (from New International Version)

Are the servants told to pull the wheat out first? No. First weeds get burned, then wheat comes into his barn. If the saints get sucked out of the world before the burning starts, wouldn't he have told them to bring in the wheat and then destroy the weeds?