Terrorism is subjective relative to the system in power. And I said "linked to" not "is". Having the opinion isn't terrorism. But giving money or vocal support to people who then invite others to or themselves try to violently overthrow a form of government is - from the subjective perspective of people in the current system - closely linked to terrorism. If they had succeeded in installing Trump as the continued leader in a post-democratic US, it wouldn't have been terrorism. Because they would've been judged under the new system of government. But they didn't succeed so far. So from the perspective of a post-Trump democratic government, it was terrorism. Terrorism doesn't mean every single person is scared afterwards, so your personal feelings towards it aren't the defining factor.