It is not the year 1763 it is 1 thousand 7 hundred sixtythree wars we are talking about
1763 wars, of which 123 (7%) have been classified to involve a religious conflict. Of these 123, 66 wars involved Islam.
What do we know why people fought
What about the 20th century?
How many were killed in religious wars?
How many were killed by their political leaders outside of the war? These 8,000 000 were as a rule not killed of religious reasons but because they just happened to be different.
The worst genocides of the 20th Century 8,000,000
Mao Ze-Dong (China, 1958-61 and 1966-69, Tibet 1949-50) 49-78,000,000
Jozef Stalin (USSR, 1932-39) 23,000,000 (the purges plus Ukraine's famine)
Adolf Hitler (Germany, 1939-1945) 12,000,000 (concentration camps and civilians WWII)
Leopold II of Belgium (Congo, 1886-1908)
Ismail Enver (Turkey, 1915-20) 1,200,000 Armenians (1915) + 350,000 Greek Pontians and 480,000 Anatolian Greeks (1916-22) + 500,000 Assyrians (1915-20)
Pol Pot (Cambodia, 1975-79) 1,700,000
Kim Il Sung (North Korea, 1948-94) 1.6 million (purges and concentration camps)
Menghistu (Ethiopia, 1975-78) 1,500,000
Yakubu Gowon (Biafra, 1967-1970) 1,000,000
(Note: the crimes committed by right-wing dictators have always been easier to track down than the crimes against humanity committed by communist leaders, so the figures for communist leaders like Stalin and Mao increase almost yearly as new secret documents become available. To this day, the Chinese government has not yet disclosed how many people were executed by Mao's red guards during the Cultural Revolution and how many people were killed in Tibet during the Chinese invasion of 1950. We also don't know how many dissidents have been killed by order of Kim Il Sung in North Korea, although presumably many thousands).