Unintentionally Unsympathetic: Ned blows up at the piss-poor job the townspeople do of rebuilding his home after it's destroyed. Except, he's the one who didn't buy homeowners insurance—a thoroughly and grossly stupid and irresponsible decision—and therefore didn't have the funds necessary to purchase/build a proper house.
Plus, the tongue-lashing he gives the Simpsons is for once, completely unfair and undeserved. He blasts Marge, saying, "My family can't live on your good intentions!" You mean the family that you have failed to provide for? It is NOT Marge or the townspeople's fault that your family doesn't have a roof over their heads, Ned, it's YOURS. He then blasts Bart for defending his mother, Lisa for defending Bart by truthfully pointing out that Bart has done nothing wrong, declares Homer to be "the worst person I've ever met".—someone who just tried to build him a house!
A bit of Fridge Horror there—suppose Ned had died and left his wife and children with no financial support because he didn't have life insurance? Even now, he or one of his sons could become ill and have no means of paying medical bills because he doesn't believe in getting health insurance either.