Actually heavy machine gunners are the primary targets, way before snipers are. A sniper takes out one at a time with a magazine that generally has somewhere around 10 rounds, and fires semi-automatic or needs to cock the rifle back after every shot, which takes time. A C6 General Machine Gun fires 220 rounds from a belt and can devistate an entire platoon. When they hear the sound of a C6 machine gun from a mile away, they cry and shit their pants while you laugh and jizz in yours.

And no, the medics aren't targets either. Think about it, what do medics need to save people? Supplies. You want the enemy to use up their supplies. In war it's better to wound your enemy then to kill them, why? Because killing a soldier removes one person from the battle. Wounding them removes 3, as it's going to take two people to drag them away.