In fact, in Europe only less than 0.5% of terrorist attacks are carried out by Muslims. A great majority (84.8%) in 2006-2008 were attributed do separatists, with the second largest group of perpetrators being left wing extremists. Similarly, in the US only a fraction (6%) of all attacks from 1980 to 2005 were attributable to Muslim terrorists, with attacks by Jews actually being more common (at 7% of the total). One might argue that Islamic terrorists still have a higher tendency to blow themselves up as well, but do note that 209 of all 318 terrorist attacks that happened in the US in 1980-2005 were bombings. Clearly, more often than not, a bomb attack is carried out by someone who is not a Muslim. The idea that all, or even most, terrorists are Muslims is simply false.

Estonia is a collective noun, so in British English using the plural verb form is completely correct.