I submit that it wasn't in fact clear that advancedatheist was referring to the specific subset of Islam/Muslims you have in mind, as evidenced by

• 2 of the 3 direct replies to advancedatheist interpreting advancedatheist generally, rather than as you've interpreted them
• advancedatheist writing in generalities like "Toxic religions" (rather than e.g. "Toxic branches of religions") and "immigration restrictions to keep Muslims out" (rather than e.g. "immigration restrictions to keep fundamentalist Muslims out")
• other people having called out advancedatheist before for making political comments not very relevant to the surrounding context, suggesting that context isn't a reliable guide to interpreting advancedatheist

I also notice advancedatheist didn't respond to Lumifer or NancyLebovitz along the lines of "you're misunderstanding/misrepresenting me, I actually only mean such-and-such a subset of Muslims".