Ron Paul supporters?

My question is this (as I am a RP supporter too). Say we have our way, and we leave the Middle East and occupation across the globe. The year is now 2078, radicals islamists overtake every government in the middle east, and implement sharia law. They are extremely happy and have no problem with us, however, they think we should now consider their way of life as the best. They look to expand their sites on the US, and set their sites on a coup of our government. They militarize and come for us, but secretly and covertly. I do not believe this to be the case now, rather they just want us out of their way so they can take back the holy land they are so hell bent on taking (and have been fighting over for the past 2000 years). Do we fight them then, or when? How will we know when we've reached the point where they are happy with us - yet think we should join their religion and adhere to their values.