In Inglourious Basterds no witness survives to share with the world what Shoshanna and Marcel did

I had this thought recently while watching the latter half of the movie, that when Landa, Aldo, and the other guys leave and make the deal, the only people that remained to see the special recording Shoshanna and Marcel made and projected were the ones that died at the theatre. The only assassination plot the survivors had knowledge of was of operation kino. In fact, the entire basis of the deal Landa was able to strike for his own benefit was under the assumption that operation kino was the only way the 4 primary targets would be killed that night. Otherwise Landa's actions were just redundant.

In a way the characters Shoshanna and Marcel may be a representation (whether intentional by Tarantino or not) of all the unknown people that, in their own way, made the ultimate sacrifice trying to destroy the Nazi regime.