It's technically not illegal, however, you could be arrested for flying it if you do so in connection with promoting hate/racism.
Yes. A great number of disgusting, distasteful and unpleasant things are legal in the United States, of which the Nazi flag, the ISIS flag and the Confederate flag are only a few. We have this peculiar custom called "Freedom of Speech", enshrined in the First Amendment to our Constitution. Are you offended by that? Then don't look.
Yes, it is legal in the US to fly a US, or other flag, from your car. Many people do that.
It is legal to fly the US flag on a pole in your yard, unless you are somehow doing so in a manner that is disrespectful of it.
They fly a different flag, because they are a different country, now if they were the same country, they would fly the the US flag.
No
The present canadian flag was first flown in 1965.
Yes, Its legal to fly it in any state. It's your 1st Amendment right.
It is legal to display any flag in the US. This is a matter of freedom of symbolic speech.
you can be any age
The Nazi flag represents oppression and the killing of different groups of people. The flag may not have done those things but they remind people of them. It is illegal to fly the Nazi flag in Germany, or to display other Nazi symbols. When Germans were permitted to run their country again after occupation by the Allies wwas nominally ended, those who took control had been anti-Nazis, so they had no difficulty banning Nazi symbols as part of the process of assuring the victors that Germany would not do that again.
The first known flag to fly in Canada was St George's Cross, carried by George Abbot in 1534.
Canada's Maple Leaf flag flew on Parliament Hill for the first time at the stroke of noon on February 15, 1965.