Original sentence: Rummel's criteria also exclude civil wars within democracies, over legitimacy or secession, such as the Sonderbund war, the Anglo-Irish War and  the Irish civil war which followed, and the 20th century civil wars in Colombia, Spain, Uruguay and Sri Lanka.Supporters of the democratic peace theory disagree with this analysis of wars before the start of the Cold War and note that this explanation cannot explain the continued peace between democracies after the end of the Cold War; although some argue that this is Europe can be partially explanied for by the existence of a European Union.The Sino-Vietnamese War  may be a  counterexample to the implied "bloc peace theory" even  using the Rummel criteria of at least 1000 deaths in battle and that both regimes should be older than 3 years at the start of the war
Edited sentence: Rummel's criteria also neatly exclude civil wars within democracies, over legitimacy or secession, such as the Sonderbund war, the Anglo-Irish War and  the Irish civil war which followed, and the 20th century civil wars in Colombia, Spain, Uruguay and Sri Lanka.Supporters of the democratic peace theory disagree with this analysis of wars before the start of the Cold War and note that this explanation cannot explain the continued peace between democracies after the end of the Cold War; although this is largely accounted for by the existence of a European Union.The Sino-Vietnamese War  may be a  counterexample to the implied "bloc peace theory" even  using the Rummel criteria of at least 1000 deaths in battle and that both regimes should be older than 3 years at the start of the war;  a True Believer in  the hypothetical theory would declare the unified Vietnam of 1975 a new regime, and anyone could observe that China and Vietnam were in different blocs