Given that climate change is the primary reason for restricting nitrogen fertilizer, it's implicit that the farmers are contributing to climate change. Are the people claiming that the farmers are being blamed for climate change saying that the farmers are the only or primary driver for climate change? That would obviously be incorrect, but the former claim is absolutely correct.
Maybe it's not part of the conversation in the Netherlands, but I'm not seeing what's factually wrong about it. Are they actually claiming that climate change is part of the discussion in the Netherlands? If this isn't part of the conversation in the Netherlands, what exactly are they talking about?