Why do you think the bank suddenly wants the logans to pay there morgage in full?

the Wallace store is on Granger land and that Harland Granger lives in the past. Also, starting a boycott against the Wallace store is tantamount to saying that blacks and whites are equal by seeking to punish the Wallaces for the murder of a black man, a claim that may be dangerous in their town's current racial climate. The day after they get back, Mr. Granger arrives at the house. He suggests that their loan for the second two hundred acres of land might come due anytime, especially since the bank owner doesn't like people stirring up bad feelings in the community. By asking for the money all at once the Logans would default on their loan and lose their land.