Definitely. There was a huge turnout in October 2001 to the initial meeting of the BNCPJ. (And that size sparked a moment of false hope in me.) And there was another spike just before the Iraq war. But in general the curve was downward from the beginning. Like earlier issues after the early '70s (Central America, Apartheid, various local issues) the anti-war movement of the last decade has been "forced" by a core. Most people just yawned. But Obama more or less crushed even that core, who are turning to other issues. Glen Ford noted that Obama was a "problem" for the Black left; he's a problem for all of us, though less intensely I suppose than for black leftists.
Carrol