Bet you didn’t know that there fairly much exist nothing that muslims didn’t invent :).
In this long-drawn out claim, about “Al Andalus”, the falsifications roll out like peas from a bag. These guys make Stalin, Hitler, Mao and other history-revising monsters of human history look like rank amateurs. Maybe they did invent lying?
Anyway, firearms, for example, were invented by the Chinese, long before islamists started having work accidents in their kitchens. Of course, the Chinese, being people of culture, had better things to do with their kitchens and kitchenware.