It's hard to say for sure whether or not crocs are to blame for the fires in the Amazon. However, there is evidence that suggests that they may be playing a role. For instance, it's been reported that croc farmers are sometimes responsible for starting fires in order to clear land for their farming operations. Additionally, the skins of wild crocodiles are often used in the production of footwear and other products, which may incentivize the hunting of these animals.
That being said, it's important to remember that the Amazon rainforest is a vast and complex ecosystem. There are many factors that can contribute to the outbreak of fires, including drought, deforestation, and the actions of humans. It's possible that the role of crocodiles in the fires is just one small piece of a much larger puzzle.