>>4439139>Acid attacks are on individuals, not large attacks.Yet this does not disprove the validity of it being due to cause terror, and to change other's point of view by inflicting anxiety at the population. Thus it would correlate with the term terrorist.
As for that about European terrorism, they have increased by a prodigious amount ever since mass immigration has been introduced in many Western European nations. I cannot speak for Spain, for I do not know what the political environment is. As for the Balkans; they are the Balkans.