Was Crocodile stronger at Marineford? Or was he holding back in Alabasta?

 During the Alabasta arc, Crocodile displayed a level of power that was initially considered overwhelming by the Straw Hat Pirates. He possessed the Logia-type Devil Fruit called the Suna Suna no Mi (Sand-Sand Fruit), which granted him the ability to control and transform into sand. He had a reputation as a Shichibukai and controlled the desert kingdom of Alabasta from the shadows. His strength was showcased through his battles with Luffy and others. At Marineford, Crocodile was present as part of the war that took place at Marine Headquarters. While he did participate in the battle, he didn't display the same level of dominance as some other powerful characters present. This has led fans to speculate that he might not have been as strong as initially portrayed in Alabasta. It's important to note that power scaling and character abilities can be subject to interpretation and development by the author. Oda often keeps details deliberately open-ended to keep the story intriguing.

What caused the downfall of anarcho-communism in Spain?

 Anarcho-communism played a significant role in the Spanish Civil War (1936-1939) and was an influential ideology among some of the anti-fascist forces that fought against the Nationalist rebels during the conflict. However, anarcho-communism did not ultimately succeed in Spain and was eventually suppressed by the victorious Nationalist forces.

There were a number of factors that contributed to the downfall of anarcho-communism in Spain. One key factor was the political and military context in which the ideology emerged. Anarcho-communism was strongest in parts of Spain that were controlled by the anti-fascist forces, which were facing a formidable enemy in the Nationalist rebels, who were supported by Nazi Germany and Fascist Italy. The Nationalists ultimately won the civil war and established a fascist dictatorship under General Francisco Franco, which suppressed all forms of opposition, including anarchism.

Another factor that contributed to the downfall of anarcho-communism in Spain was the internal divisions and conflicts within the anti-fascist forces. Anarcho-communism was just one of many ideologies that were represented among the anti-fascist forces, and there were often tensions and conflicts between different factions. These divisions and conflicts may have hindered the ability of the anti-fascist forces to effectively resist the Nationalist rebels and contributed to their ultimate defeat.

Overall, the downfall of anarcho-communism in Spain was the result of a complex interplay of political, military, and social factors that were specific to the context of the Spanish Civil War.