None of the definitions you used cited: intentionally harming civilians.
And even the European Law one didnt cite it.
It cited.. incase you cant read more then 2 words:
...given their nature or context, may seriously damage a country or an international organisation where committed with the aim of: seriously intimidating a population; or unduly compelling a Government or international organisation to perform or abstain from performing any act; or seriously destabilising or destroying the fundamental political, constitutional, economic or social structures of a country or an international organisation.
No mention of harming civilians.
And even the European Law one didnt cite it.
It cited.. incase you cant read more then 2 words:
...given their nature or context, may seriously damage a country or an international organisation where committed with the aim of: seriously intimidating a population; or unduly compelling a Government or international organisation to perform or abstain from performing any act; or seriously destabilising or destroying the fundamental political, constitutional, economic or social structures of a country or an international organisation.
No mention of harming civilians.
UK law is a bit more specific. See, its not just the US that states it.