To me, it means
1)Standing with a country or a people against outside intervention(military or political), and being willing, if necessary, to put one's own body on the line against such intervention;
2)Denouncing any attempts to coerce an outcome those people or that country do not wish to see;
And to me, it requires nothing else...it especially does not require silenct acquiescence in actions or practices that go against my values as a leftist, a person who shares both humanist and progressive religious values, or simply a decent human beings.
It does NOT require anyone to defend things in one situation that a person wouldn't defend in others.
That's what it means to me. What does it mean to you?