That is why "Mein Kampf" was banned in Germany... to prevent the problem from recurring.
Yet the Koran is even more pernicious. As long as it holds sway in what is now the Muslim world, it will remain a threat.
Hiding the Koran won't help.. Look at the Christian Bible for examples.
And let the stones fall whever they may.
But, if you make it secret, then you will create a demand.