How can some of the "patriots" here think that USA nationalism is good despite what history has shown us?

Seriously, there are countless examples.
Update: Americas 1837 — Patriotes Rebellion 1846–1848 — Mexican-American War 1898 — Spanish-American War 1970 — October Crisis Balkans 1821–28 — Greek War of Independence 1878 — Bulgarian War of Independence 1912–13 — Balkan Wars 1990–2000 — wars in the former Yugoslavia China 1900 — Boxer Rebellion... show more Americas
1837 — Patriotes Rebellion
1846–1848 — Mexican-American War
1898 — Spanish-American War
1970 — October Crisis
Balkans
1821–28 — Greek War of Independence
1878 — Bulgarian War of Independence
1912–13 — Balkan Wars
1990–2000 — wars in the former Yugoslavia
China
1900 — Boxer Rebellion
Europe in general
1618–48 — Thirty Years' War
1866 — Austro-Prussian War
1870–1 — Franco-Prussian War
1914–18 — World War I
1939–45 — World War II and the Holocaust
Ireland
1798 — 1798 rebellion
1848 — Young Ireland rebellion
1867 — Fenian rebellion
1916 — Easter Rising
1919–20 — Irish War of Independence
1920–1 — Irish Civil War
1969–2001 — Northern Ireland's Troubles
Poland
Polish Uprisings
Middle East
19th century–present — Kurdish conflict against Turkey
1915–present — Kurdish conflict against Iraq
1957 Suez Crisis between Egypt and Israel, France and Britain
1917–present — Arab–Israeli conflict
Spain
1960–2001 —Basque conflict
Update 2: I love how all the answers I got were for me to cite examples you are too lazy or to dumb to read about for yourself!
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