Nationalism, patriotism - difference?

From a 4chan thread:

OP:

What's the difference between nationalism and patriotism?

Emil:

l2google. Spent <5 mins on Google and found this. http://plato.stanford.edu/entries/patriotism/#PatNat Because you may not know how to do a proper search. Here is what I did: 1. Googled "difference patriotism nationalism" 2. Checked various sites looking for something reliable. failed to find that. 3. Wiki'd "nationalism" and "patriotism". In the 2nd article, it is mentioned that it is a similar sentiment to nationalism. I check the three sources. Two of them link to SEP. SEP is a great source. I check both SEP articles. One of them has a section on the distinction between the two. Job's done. - First, perhaps this will help some people with learning how to find things on Google. I have used search engines for many years and have internalized how I look for information, so I don't even think about it when I do it. Others may still need to do so. Second, there doesn't seem to be any important conceptual difference between the two that is worth remembering. It seems better to simple ask the person what he means if one finds oneself speaking with a person who is making a distinction between the two. Third, not very related but I love this quote.

If love is blind, patriotism has lost all five senses.

• William Blum, Rogue State (2006) [found via Wikiquotes]