In a fragmentary perception, so in fear, anger, sorrow, things can escalate very fast. The ruts of tradition are most intimate. We are xxx and they are yyy. So there must be borders, walls, because we have to defend ourselves against the enemy. So warfare, army, so a preemptive strike, so war. It can be over something imaginary, a trifle. Was there a bomb on the plane or it just crashed because of bad weather?
An obsessed mind changes to the usual track in the fifth sentence. Don't tell me you control thought. You control thought or thought makes you crazy?