In the last chapter, does Frikkie ever understand the difference?

No, Frikkie never comes to understand Tengo's feelings or the reasons for revolt. Frikkie is unable to look beyond his own circumstances and the way his own family farm has been run. In Frikkie's eyes, his uncle always treated his workers fairly and with kindness, and he intends to do the same. He never comes to understand Tengo's point of view.