Question

How might the spread of the Arab Muslim empire have been different if it had not treated Jews and Christians as it did?

Answer 1

A strong response will look like this:

The Arab Muslim empire treated Christians and Jews with tolerance. If they had not done so, they would likely have faced more difficulty conquering many people of these faiths. Additionally, once they had conquered them, they may have found it more difficult to maintain control, as their subjects would have been more likely to rebel.