By brother Tripoly sunni:
السؤال: هل الجهاد في سبيل الله واجب ؟
الجواب: الجهاد مع المعصوم (علیه السلام) أو نائبه الخاص واجب وهو حكم شرعي.]
Question (1): Is Jihad in the cause of Allah an Obligation upon Muslims?
Answer: Jihad with the infallible PBUH or his special representative is an Obligation and a Hukm in Sharia.
So According to him jihad against the occupiers is not an obligation upon any Muslim unless the MAHDI appears or one of his 4 emissaries who died 1200 years ago.