"Conservative" becomes quite meaningless when your idea of a lost "golden age" we should be aspiring to, is an islamic theocracy that used slaves extensively.

That early "golden age" was certainly a lost paradise compared to any Islamic theocracy that has existed since, but it was destroyed by the rise of the Mongols in the East, and of a more fundamentalist version of Islam which made a strict interpretation of religion take precedence over rational and scientific enquiry. 

Refugees from the fundamentalist theocracies of the Middle East and North Africa are welcome here if they are fleeing the fundamentalists, but not when they blame the failure of their societies on "the west" and "not being good enough Muslims", and come here to take advantage of the superior economic conditions, while wanting to establish that fundamentalist version of Islam here.