"What is the ruling on bombings which take place in non-muslim countries?"
Answer by Shaykh 'Alee al-Faqieehee:
"They are not allowed. These bombings (which take place in Non-Muslim countries today), they also take place in our country. You all know what recently happend in Riyaadh. The thing which got these people to do these acts is nothing but their (wrong)Aqeedah."
(Excerpt from Sharh Tafseer as-Sa'dee (2:178), 08/14/1423 - 10/10/2003)
source: Message from Br. Mahir (salafitalk id: easy)