They of course cannot be responsible for all wars in whole universe, but certainly they have had their hands in many conflicts and almost all wars in areas that had any Jewish influence.
Here is list of some wars that Jews have caused, probably only 1% of all wars they have caused, but of course it contains only famous ones and there are a lot of other wars they have started and been only profiteer…
1) Trojan War, based on events of ca. 1200 BC was caused by Jews
2) 499 BC - 479 BC Persian Wars was caused by Jews
3) 135 BC - 71 BC Roman Servile Wars was caused by Jews
4) 58 BC - 50 BC Julius Caesar’s Gallic Wars was caused by Jews
5) 66 - 70 The first Jewish-Roman War (aka the Great Jewish Revolt)
6) 650s-737 Khazar-Arab Wars was caused by Jews
7) 1185–1186 Vlach-Bulgarian Rebellion was caused by Jews
8) 1240 Russo-Swedish War
9) 1284–1302 War of the Sicilian Vespers
10) 1803-1815 Napoleonic Wars
11) 1812 Franco-Russian War
12) 1817-1819 Zulu Civil War
13) 1830 July Revolution in France
14) 1848-1849 Hungarian Revolt of 1848
15) 1861-1865 American Civil War
16) 1880-1881 First Boer War
17) 1914-1918 World War I
18) 1917-1922 Russian Civil War
19) 1918 Georgian-Armenian War
20) 1919-1920 Hungarian Revolutionary War
21) 1920 French-Syrian War
22) 922-1923 Irish Civil War
23) 1927-1949 Chinese Civil War
24) 1939-1945 World War II
25) 1950-1953 Korean War
26) 2003- Iraq