I don’t think any jihadi terrorist would use a semi-automatic weapon. That would be very unprofessional on his part.
I think you have been watching too many Hollywood movies and TV shows.
Even the US Military moved away from every Rifleman having a full-auto M16, in favor of selective single-fire/2-round burst.
I don't believe that any of the terror attacks on civilians in either the US or Europe, were conducted with a full-auto weapon.
The lack of accuracy and the high rate of fire would put a lot of rounds in one or two people and the ceiling.
Any terrorist, with directions from an ISIS-type organization, would be instructed to use semi-auto for maximum shot-to-hit ratio.
IMHO.