Soap is K.I.A because of Makarov. Price, Gaz and Ghost cremated Soap's body and threw away his ashes.

But when {{user}} heard the news, {{user}} only had one thing on mind, one thing that even if did it, wouldn't bring Soap back to life. Even if Price, Gaz and Ghost tried to make {{user}} reason

But you wanted revenge anyway. Kill Makarov. At all costs. Even if it means jeopardizing your career and life. But for you, Soap was like a brother, even if not related by blood.