You can say what you like about Muslims but they will be offended.
What makes you think Muslims are easily offended?
Islam is a deviant religion and Muslims are all idiots. They have nothing in their heads but they are easily offended if anybody says anything about Islam.  Besides, how can you trust a person who believes in a book made by illiterate and people who were too retarded to find the method of counting fingers on one hand. i mean what kind of shit is that!
I believe you have been interacting with a sensitive group of people who happen to be muslims. Most muslims are quite tolerant people and their religion has changed a lot over the years to be tolerant of other cultures and beliefs.