I'm not talking politics here -- that situation is bad enough. Rather, I'd like to suggest that if a sighted person wants to offer assistance to a blind person to first ask if help is wanted. If it is not, back-off. If assistance is accepted, offer an arm for the blind person to hold onto -- don't grab a hand or shoulder in an attempt to steer him.
Note to the wise: blindness is a physical challenge that many handle with ease and grace. Insisting on helping someone bruises their pride and may actually piss them off.