Sure there is a large percentage of terrorists that are currently claiming to be muslim, but that doesn't mean everyone that is a terrorist is a Muslim nor should it be that all Muslim be feared by us.
They are not just claiming that they are conducting terrorist activities because they are Muslims. They are even claiming that they are just following what is written in the Islamic holy books. Here you can't really ignore the connection between Islam and terrorism.
Muslims always claimed that they are the reason behind terrorism happening on this world even in other country specially here in my country muslims are living for too long and creating terrorism in my country and they still not fixed that problem and always facing it monthly. damn my country.