@LuisDantas On second thought I have a different question. Do you agree that suicide attacks and bombings by people claiming to be Muslims, and Ahmadiyya Islam, are widely considered as part of one religion called “Islam”? Would you agree that the Westboro Baptist Church, and the Quakers, are widely considered as part of one religion, “Christianity”?
Maybe you don’t agree with lumping them together that way. However that may be, what definition of “religion” do you think people are using, to lump them together as part of one religion?
ETA: Or, how do you think it happens that they consider all that as part of one religion?