Why would the Americans stop to help German wounded when there are more germans in the forest?

They didn't even stop for their own guys - they couldn't. they had to take their objectives. If your buddy fell - You left him there and moved forward.

You just hope a medic comes along and patches him up. You might move him out of the line of fire, but c'mon.. If you're in battle, and giving chase to krauts you don't fucking stop and let them set up their 42's again...