I believe that it is real. There will always be people who have power in causing fear. That kind of power is hard to get rid of. Its easy to acquire all it takes is weapons, followers, and a will. It won't go away unless we can actually stop the people who want to do these things.
Though the term is used lazily these days and much of what is called "terrorism" is not, there is still no denial of it being a threat in our world. Whether you are in the United States or elsewhere, there are people that do not like you and there are people in that group that have little regard for their own safety. They have the potential to be terrorists.
I think the 9/11 attacks as well as the numerous across the world can lead us to believe terrorism is real. Whether or not it is in the name of God, I believe that terrorism is a real thing which can lead to tragedy and grief. I think it would be preposterous to even call terrorism fake.
When traditional warfare fails to bring about change or policies in various parts of the world, terrorism often makes a statement when civilians take matters into their own hands. Terrorism has been around as long as mankind itself. Terrorism doesn't have to be organized, but the definition remains the same. When civilian targets cause deaths to bring about political change, that means terrorism has been involved.
Terrorism is needed these days if government wants to continue its mass monitoring policies. Without terrorism, a huge amount of budget must be cut, many high-profile contractors will loose their job, mass surveillance has to finish.. Etc. So if you look clearly, the government creates terrorism for its own benefits...
Most of the time terrorism does not exist in a way it used to be interpreted. The terror actions that society faces are usually done by a certain government itself. For example the 11th of September, 2001 wasn't a terroristic act made by al-Qaeda. It was made by the US government and scientists proved it when they were exploring the crash.(It wasn't expected the building will crash vertically after the aircraft collided with it). The "Zeitgeist" movement clearly explains how this particular issue and many more terroristic acts people face today.