Yes, Germany should send troops. They are definately the most neutral but just to avoid any WWII reminders it'd be best if the Germans were deployed in the more Northerly section of the area to be patroled by the UN while other UN peacekeepers are along the border with Israel.
Oh, and Germany should send armed peacekeepers, unarmed peacekeepers even if just in a support role would recieve a rather rude awakening to how much some people hate the US, Europe, and Israel.
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