Why did firestar decide to go to see onestar?

Thanks really a matter of what people think. He went to great measures to seperate WindClan from ThunderClan so the other clans didn't mock WindClan. However, he launched an attack in the middle of the night at ThunderClan's camp, dragging all four clans into a one-night war. I say that wasn't a smart move, but he intended for the best. I say he's an alright leader, not the best or smartest one ever though.