Most of these people were probably about 14-15 when 9/11 occurred and not concerned with world issues.
Are you only concerned with world events that have taken place during your post-teen years? The first Gulf War in 1990 only lasted less than 9 months and pushed Iraqi forces out of Kuwait. The entire time between then and 9-11-2001 was peppered with air and missile strikes to defend the no-fly zone, keeping Iraq in effect unable to deploy air assets to support his ground troops. After 9-11, the UN weapons inspectors tried to ascertain the status of WMDs in Iraq, but Saddam Hussein used one excuse after another to delay and block the inspections. Finally, in 2003, we began Operation Iraqi Freedom in order to topple the regime under Saddam Hussein and oust him as the dictator there. Since then, we have been engaged in Iraq and Afghanistan to rid the world of the Taliban and Al Queda leadership and hopefully dismantle the worldwide terrorism network responsible for thousands of deaths of civilians globally. That effort is called Operation Enduring Freedom.
To me, if you've been alive during the last 14 years and are old enough to start college, you should at least be curious why your friends' parents, brothers, sisters, cousins, uncles, aunts, and so on are in the gulf region fighting a war. These are events happening TODAY and have been happening almost since the 9-11 attacks. Renewed interest should have been created after the Benghazi attack on 9-11-2012.
Please, don't try and tell me these students were too young to be concerned. They have had THEIR WHOLE LIVES to become concerned! Growing up during a period of armed conflict in which your own country's people are dying and coming home wounded should create at least some SELF INTEREST. If there's a chance the war is still happening when they reach 18, are they going to want to choose volunteering for service over college? it's a huge issue that every high school grad should at least be aware of.
And you might want to check your math. These student would have been 4 or 5 on 9-11-2001. They are 18-19 years old now.
Nowadays, age has little to do with it. The majority of Americans care more about pop culture and where they are eating dinner tonight than they care about world politics. The reason these kids are not concerned is because the people who influence them at home, at school and in the media teach them not to care. They continue to call it "Bush's War," but don't stop to think Obama is the Commander in Chief now, and he has been CinC LONGER while Americans have been deployed in Iraq and Afghanistan THAN BUSH WAS IN OFFICE during the conflict! (Bush: 2003-2008 .... Obama: 2008-2015).