Actually the hammer and sickle WAS (in the Soviet Union) and continues to be in communist nations, a political symbol of the communist party and DID and still DOES represent the ideology of the party and the state as well as of those satellite states that also adopted the totalitarian tyrannical system. Using the hammer and sickle is no different than using the swastika. Both are symbols of hate and both should be allowed to be expressed as such in a free liberal society. At least if we ban expression regarding the swastika, we should be consistent and ban expression regarding the hammer and sickle as well, and then any other hateful symbols as we declare them as such. Otherwise it's just hypocricy.
If you look at what I said, and look at a few Russian aircraft - both WW2 and more recent, you might just notice that they display the RED STAR and NOT the HAMMER & SICKLE! The Balkenkreuz and the Red Star are the insignia of their respective national air forces today, as they were during WW2. The Russian Red Star has gained surrounding Blue and white narrow stars, BTW.