Never confuse Islam with terrorism. Islam is the purest of all religions and a way of life that necessitates submission to the one true God, Allah, the Lord and Creator of all that exists, He is the All-Loving and would never wish any harm upon His creation.
Therefore, Islam is free from such false accusations. Terrorism has no religion and those who carry out such outrageous acts are not representative of faith in God. The truth of the matter is that Muslims have also suffered just as much if not greater from terrorism over the decades.
Whilst 9/11 was a tragic day, and thoughts go out to all those who lost their lives, I believe every day in which a noble human life is taken at the hands of terrorists and murderers is also a tragic day.
I remember in 2016, during the Islamic month of Ramadan, I was in Madinah at the Masjid an-Nabawi (The Prophet’s Mosque and the second holiest Mosque in Islam) praying and preparing for Iftar when suddenly a loud and dangerous explosion went off in the vicinity of the blessed Masjid itself. The blast caused panic, chaos and havoc and it was reported as a suicide bombing that killed a handful of worshippers of Allah. Demonstrating exactly how the terrorists have no regard for Islam, Muslims and Human Life.
May Allah protect us from the evildoer, Ameen.