The question is not whether the people should get trained or not, the question is whether the government can REQUIRE it without running afoul of the Second Amendment, and whether the government can be trusted with information that could be used as a registry of those exercising their rights. (Hint: No)
William Tell, I used to train young soldiers with the M-14, M-16 and the .45; the country boys had no problem catching on and excelled in markmanship; the city boy enlistees however had usually never fired a weapon, the Army and I taught them how.
I don't intend to infringe on anyone's 2nd Ammendment rights, I just want somebody who buys a gun to know what the hell their doing with it!