(b) In fact, the British soldiers were not "confiscating guns" but were trying to take the armory of an organized militia. The conflict had escalated quite far by that point and the reaasons for that escalation were self-rule and taxation.
Yes, they were screaming at each other over taxes (and at a rate so incredibly low by today's standards), but until they tried to take the guns, they were still just shooting their mouths off at each other. The colonists knew that if the guns were taken, they would have nothing to back up their mouths and the taxation and regulation would get worse. And we'd still be drinking tea, or more likely, German beer and speaking German today.