"Ah ..." Gen glanced over at Senku, knowing this part would annoy him, too. "It's not the planet itself that's the enemy. As I mentioned, it's really not about whether the Earth is flat or round, after all. It's about making whoever they think is behind the 'round Earth lie' the enemy."

Yes. It's completely ridiculous. It's the same thing behind the crazies who thought the moon landings were faked. Gen thought it was a pretty reasonable guess to think those pissed Senku off, too.