Why did leaders of some communist parties take positions hostile to their country's revolutions against imperialism?

Conclusion:

"In the foregoing, we reviewed the experiences of communist party leaders who miscalculated the political situation and clashed with national revolutionary movements hostile to colonialism and imperialism. This was caused by the fact that these leaders were affected by their bureaucratic party experiences and dogmatic and Eurocentric background that made them project preconceived ideas that were inconsistent with the reality of their societies. This led to the aforementioned mistakes, which contributed in some instances to the failure of the revolutionary movements in their fight against imperialism, especially in the case of Che Guevara in Bolivia and in occupied Palestine against Zionism."