This was a quick read, but I am now confused. I did not hear is many people were on Manning's side, like some seems to be on Snowden's, but since they both leak

This was a quick read, but I am now confused. I did not hear is many people were on Manning's side, like some seems to be on Snowden's, but since they both leaked classified info, doesn't Manning make the entire action look as if it was just because of mental instability? In other words, while some thing of Snowden and maybe Manning as heroes, doesn't his defense stain his action with a more or less "it wasn't really me" as opposed to "it was the right thing to do for the people of the US"? I just wanted to know what other people though about this.