Is the coining of the term 'alt-right' an attempt to associate racist organizations with all conservatives?

No. The term alt-right refers to a alternate version of conservatism, but not one associated with the main. Alternate in the sense that, at its root, it shares more values with the conservative party than liberal, as the alt-left does for liberals. Alt left would include such wonderful (sarcasm) figures such as Che, and other revolutionaries of the sort. Unfortunately for conservatives, we have alt-right figures such as Hitler.

1 Marine first sergeant had a good post earlier. Instead of calling them all to write just call them Nut jobs. I mean they made fun of Illinois Nazis in the 1980 movie Blues Brothers. now we can make fun of them again because Hitler is dead. Mind Kampf was a big battle. Hitler has DNA from North Africa and Arab tribes. and nationalism and white pride Is actually the science of stupid. Just like eugenics. there is still freedom of speech. We don't have to listen to them. and I don't think Donald Trump will be paying much attention to them either. Since American Nazis pretty much went away in 1941.. and if David Duke and these guys don't think the Holocaust existed just because the others were destroyed at Auschwitz before the Russians took it over. We still have all kinds of living people and documentation even World War II veterans that are still alive that can say that it happened. The author is associated with neo-nazis. Is an embarrassment to the conservative cause. Even tea party people are not associated with them. I think they will go away pretty soon because their stupidity will just show the more they salute or use German terms from 1933.

I hate Illinois Nazis

The continuing innuendo war that has been waged since our Union began. All you have to do is look at our media, education system, press and social media. When you get so many people "accepting" a term, word, phrase you end up turning whole populations over time.

When a lie is repeated often enough it takes on the shine of "truth". When enough people believe this "truth", those with the actual truth sound like they are spouting lies. It is an old propaganda trick.

Alt-right according to many are young people who are dissatisfied with current politics and politicians and are therefore anti-establishment. Anti-globalist and pro-nationalistic.
These are the guys who pulled off Brexit and the Trump victory. They're not necessarily pro-Trump but they are unhappy with the status quo which makes them a target of both major parties.