Islam was always spread through the use of violence and genocide. Earlier Christianity was also like that (Americas and Africa for example), but the Christian leaders later realized that this method is more harmful than beneficial.
I different with your opinion, I think not only Muslim terrorists, other religions also have terrorists, even those as bad as Muslim terrorists, you know what a happened in aleppo and the middle east, a lot people muslims death in there, what different with other terrorist, they killed many people muslims all ages, so, we cannot accuse muslims as terrorist, dan I not agree with you, Islam is not a spread religion by means of force, I know many people muslims who condemn terrorist, they actually hate terrorists, because Islam does not teach you to be a terrorist..
I wish, we need to look more widely, not only looking through the eyes of others, we should be more open in penghakimi something.