The Internet really has a lot of opinions and these opinions allow you to make your choice. For me Islam is an aggressive religion and I don't care what you think of this site. Proof that what the terrorists shout Allahu Akbar.
Most of the major religion-based terror organizations (such as the ISIS and the Al Qaeda) take inspiration from the Islamic teachings. There may be a few terror organizations based on Christianity, Buddhism.etc., but they are less than 1% of the total.
For me personally, all Muslims are terrorists. They differ only by the fact that some Muslims are attacking openly call for Jihad, while others are waiting their time and disguised as good citizens. I don't trust them.
The Islamic terrorists follow the tenets of Islam and a majority of the Muslims believe in these tenets. For example, they believe that any person renouncing Islam must be killed. Even the educated Muslims in Western nations openly support this idea.