Scar ignored Alphonse's question, more focused on the fact that

"What the hell are you doing?" he shouted at Edward, making sure Alphonse was balanced before advancing toward the scuffle on the ground. All that registered from the fire was that he needed to get Edward out; to hell with Scar's own safety.

He reached for Edward, again, trying to pull him away. He was still conflicted about hurting the girl, especially now that Ed had given her a bit of a beating.