Banning the swastika, of whatever form, will not banish bigotry from the minds of those who love to be hatemongers.
I understand that most modern people, except those who actually have some contact to Hindu or Asatruar culture and/or rites, see the swastika solely as a symbol of hitler... but then, there are many many symbols that are seen, or have been seen, as symbols of horror at one time or another. Should we ban them all? The christian cross can easily considered a symbol of horror when we think about the burning times or the crusades, is it not a symbol of hate by the very same reasoning? A number of Muslims (however many they may be) see the stars and stripes as a symbol of evil, so should this flag be banned? Who decides that, and on what grounds? How many people need to feel horrified, and what people?
Also, let me get this straight: The swastika is banned, here in Germany, since the end of WW2, for obvious reasons. The ban did not destroy fascist madness in our country... it just made the bigots choose different symbols.
The hatred starts in the heads, not on a piece of paper or cloth.
Banning some symbols might make some politicians look good for seemingly taking action while others only talk, but it won't achieve much.
While we are talking about banned symbols: Some might be interested in the following...
http://www.rabenclan.de/index.php/Magazin/MartinMarheineckeSymbole01 shows symbols currently banned in Germany due to their use by past or present fascist groups. The article is in German of course, but suffice it to say that every symbol you see there with the stamp "Strafbar!" across it will get you in trouble with the authorities if you wear it in public here in Germany (for contrast, some pictures on that page show examples of contexts where the symbols are allowed, like the stylized human throwing a swastika into the garbage - a symbol of anti-fascist groups).
http://www.rabenclan.de/index.php/Magazin/MartinMarheineckeSymbole02 shows symbols that may or may not get you in trouble, depending on how the authorities want to handle you and the situation (first group of pictures), and symbols that will make you appear suspect in the eyes of some people although they are perfectly legal (second group). This means that, for example, if some fascist troublemakers get arrested on the street and you happen to stand near them displaying one of those symbols you might be interrogated too, just in case.
These pages show that fascist groups actively pursue a strategy of "symbol occupation", using one after another until it gets banned for the connection to them, with the goal of eventually connecting every even remotely Germanic-looking emblem to their sick ideals.
By the way, as for the "Nazi" vs. "Hindu" swastika:
The underlying symbolism of the "Nazi" (copied from Asatru) swastika is that if you superimpose two "Sowulo" runes over each other with a 90 ° angle, you get that other swastika. Sowulo mainly stands for the sun and victory, and the Asatru swastika historically was considered to be a powerful magical sign of Thor.