This is the nature of the enemy with which the United States and other nations are at war.

Al-Qaeda officials vow “revenge” for the air strikes that have hammered Islamic State positions in Syria and Iraq. And why are we striking those targets? Because of terrorist acts against innocent civilians.

http://www.nbcnews.com/news/world/al-qaida-leader-syria-warns-revenge-airstrikes-n213636

Al-Qaeda started this fight 13 years ago when terrorists hijacked those airplanes and flew them into the Pentagon and the World Trade Center. The United States, led by two presidents, have sought to finish the fight they started.

There’s no end game in sight yet. President Bush declared our intention to root out the Taliban in Afghanistan. President Obama has followed through.

ISIL has emerged as an offshoot of al-Qaeda and has executed innocents, some of whom in a horrific way.

And now these terrorists are vowing revenge?

Someone will have to explain to me how this makes any sense.