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Morally correct?
"Morally correct" as in according to one's moral principles? Is that, in its turn, something that we all agree on and share? Terrorists definitely hold moral principles that are different from mine. To a terrorist, blowing people up to bring attention to their point may be the morally correct thing to do. Hence we have terrifying people like Kaczynski with extremely strong moral convictions that deviate far from what…
I'm not really sure what you're arguing. That it's possible for someone to believe terrorism is good? I suspect most people already know that, but thankfully most of us disagree.