I think the last three seasons may show that he’d consider it.Brian is unemployed, and could very likely end up not coaching again on at least P5 level and above. (The best offer he'll likely get is position coach at G5 level, though more likely FCS)
Does Kirk love his son enough to deliberately sabotage the Iowa offense going forward so that he can "prove" the bad performance wasn't due to Brian, but due to himself, and therefore help Brian land a good job?
Remember, he’s trying to make himself look better too.