That's assuming that they couldn't attack cooling infrastructure to fry the chips or the fabs making the asics. Also, enough chaos would surely have an impact on the price.
Only psychologically. The mining capacity is driven by the price not the other way around. The rest of the miners not hit would be ecstatic because now they get less competition. The difficulty would self-adjust eventually or new mining would get brought up.
The mined supply is very small compared to the circulating one. Besides, if you were to slow minting, it should drive the price up, not down. :)
