I think we need to be careful about generalising too far, and be cautious to qualify the statements we make.
Whilst I'd hold some sympathy with the view you've expressed in light of current global issues, and while I'd be mindful that in years gone by the exporting of Christian 'missionaries' to other countries and cultures has historically had a MUCH greater Global impact than the current situation of spasmodic Islamic extremism, I'd also have to accept the following:
* Such things are NOT descriptive of the Islamic world. Most followers of that faith do not endorse such activities.
* Such things are NOT necessarily formally or surreptitiously endorsed by Islamic nations. They are generally the acts of individuals within those nations.
* The 'Western world' has its own 'sins', and the global impact of those is also horrendous.
We need to be careful how our comments are worded ;)
Edit: And while terrorism and genocide are both horrendous things, they are definitely very different ones.