Difference Between Nationalism and Patriotism

I tried to determine who or what organization is behind "Difference Between." Information about where they are located or who runs the site isn't available on the site. They are acting as though they are an authoritative source, but don't offer transparency as to ownership, management, or even location. They are somewhat suspect because of that. Webster generally agrees with the article, but doesn't cast nationalism as bad. Webster on nationalism: loyalty and devotion to nation.
Webster on patriotism: love or devotion to one's country.

I am both a nationalist and a patriot. I sincerely believe the US is exceptional in it's government and economy. I won't deny that we could improve in some areas, but I believe we are overall superior to any other nation. I've visited enough other nations to see that the US offers the best hope for freedom of mankind. I truly love the US and am loyal and devoted to it as a physical nation, political nation, and economic nation.

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