I'll have a stab at this.
Is an assault rifle evil?
No, how can an inanimate object be evil? The answer is of course it can not be. Can an assault rifle be morally wrong? Well it all depends whose carrying it, if it is Policeman or Soldier then our perception is that it is an instrument of good. Especially if that soldier is defending us or the policemen is protecting us. Then the rifle is being used in a just and moral way, the key word is used. The operator is the one who dictates the use of the rifle not the rifle itself.
If a murderer is using an assault rifle to kill for money or to threaten then it is being used for immoral purposes, however if the murderer was using a knife would you say an evil knife, the answer is undoubtedly not. The actions of the individual is evil not the tool.
An assault rifle or any firearm is morally neutral, it is designed to fire a projectile it is what the operator fires that projectile at and in what context, that leads to if the purpose was evil or good.
Having shown that assault rifles are not inherently evil the second part of the question arises should they be banned.
Well if we overlook that they are banned in Canada already and anyone who posses a firearm of any kind without a license is breaking the law.
The short answer is no they should not be banned.
To date in Canada no civilian owned assault rifle has ever been used in a homicide infact in Canada knives are the number one weapon of choice for murder.
Why should assault rifles not be banned specifically?
Well this boils down to freedom and responsibility. We have already shown that an assault rifle or any firearm is not intrinsically good or evil but rather the operator of the firearm decides moral imperative. So really we are saying that an assault rifle should be banned because a criminal or insane person may misuse it.
This is a very dangerous precedent, when we start banning and restricting things because of the possible misuse by the worst in society we allow the worst in society to dictate our freedoms and liberties.
We do not limit cars to 110kph or have them only operate if you are sober. Yet drunk drivers and speeders have killed many more people in Canada in the last 50 years than all firearms let alone assault rifles.
We haven't done this to cars because as a society we believe in freedom and liberty and personal responsibility. We punish people who break the law and we restrict their freedom and liberty, we do not punish people or restrict the freedoms of innocent people because of the actions of the insane and criminal.
Does anyone need an assault rifle?
Well that is down to the individual, everybody has different needs and wants. Our society is based on want not need. Free citizens that are law abiding should be allowed to want an assault rifle and acquire it. If they break the law they should be punished but until that day they should be shown the respect and freedoms of any other member of society.
Millions of Canadians are trusted to use firearms in Canada everyday and they do it without killing,threatening or injuring anyone. We as a society should respect that, we may not individually want or need an assault rifle, we may not understand somebody else's want or need for it but we don't have to. We just have to remember that we have wants and needs that others might not understand and the object of our wants and needs could be misused by the criminal and insane. We would want the ones responsible for this misuse to be punished and restricted not us for owning a similar piece of property.
We don't do it with cars, we don't do it with knives, we don't do it with alcohol, we don't do it with bats and we shouldn't do it with guns.
Or something like that
