"Why do I have the suspicion that other countries are involved in this?"
What other countries do you think might be involved? If you suspect Muddle Eastern countries like Iran, Syria and others that are known terror hotspots, then why would you object to the military being used to guard us from invasion during a time of war?
I wasn't thinking about Arabs, though that may be the case. I was thinking about South American countries with their drug trade. These criminals have upped the ante, so it has to be more than mere marijuana that they are protecting.