Are all the terrorists muslims?

It is wrong to say that all terrorists are muslims.
Irish Republican Army of Ireland (IRA) were named terrorists in the early 1920s, long before our own garam dal freedom fighters were called terrorists by the British.
IRA was the best organized terrorist organization till the recent past which survived for about 90 years and still has its offshoots. Its human bombs have attacked british military campuses about a year ago.
ETA of Spain came second to them in organization and are still active.
LTTE were considered in the third place then and were very well organized till last year.
Just that no one called them christian or hindu terrorists.
In free India 'terrorism' was seen in darjeeling, assam, nagaland, manipur, punjab before it was seen in kashmir.
US was and is facing terrorism from many latin american countries from times immemorial.
USA used Osama and organized Taliban against Russian forces in Afghanistan. In the late 80s the Russians retreated, but the US did not leave Saudi Arabia (USA's military base) (Osama's country) and wanted to capture the gas of Afghanistan. It is then that their own Osama and the Talibans became their foes. Until 1990 USA did not face terrorism from any muslim country.
Just that Osama and his men having worked for the US intelligence agencies, and Taliban having been trained and equipped by US intelligence agencies know the US security loopholes better.