Are we not jumping to conclusions assuming it's an Islamist terrorist attack? 

Trump jumped to conclude the gas attack in Syria was Assad but there is no proof. 

In fact it's likely the same Islamist terrorists who are responsible for the gas attack in Syria are also responsible for this terrorist attack in Sweden, i.e. ISIS, Al Qaeda, Al Nusra.

Anyway, who cares about waiting to get all the facts these days. Just jump to whatever conclusion you want.