Why were dozens of Serbs convicted of war crimes

They approved the policy of ethnic cleansing in the war.

Explanation:

Dozens of Serbs were convicted of war crimes because they approved ethnic cleansing to remove Muslims, Croats and other non-Serbs from the region.

They were convicted of crimes against humanity, including murder, torture, illegal detention, deportation and robbery in Bosnia in 1992. The TPIAI claimed that these Serbs were part of a criminal enterprise that had the permanent objective of removing non-Serbs from the territory.

They started a war that led thousands of deaths on both sides. They approved the policy of ethnic cleansing in the war. They started a war that was not sanctioned by the Serbian people. They openly disobeyed the orders of the Serbian president.