Well, what do we know?
1. We know Casey Sheehan Re-enlisted in the Army, knowing full well he could be sent to Iraq.
2. Casey re-enlisted in the Army because he loved his country and this was a way for him to serve it.
3. He VOLUNTEERED to go into the battle that ultimately took his life. Cindy herself said this.
4. A large number of his relatives (his 'grandparents, aunt/uncles & cousins) support the war, and don't support what Cindy is doing.
5. She's hardly a simple 'grieving mother', blaming this war on, of all things, the 'defense of Israel'.
6. She's already met with the president once, a meeting that she had positive comments about.
And finally-
7. Sheehan herself said she 'didn't consider' what Casey would think about what she's doing, though taking all of the above into account, I speculate his opinion wouldn't be a positive one.
From my view, she's a far-left wingnut waving the 'dead son' flag to draw attention to herself and her politics, though you'd never get that impression from watching the news.