Rivers of blood
The Ten Plagues hit horrifically at the central features of Egyptian life, the economy, the agriculture, the food supply, the transport network, the monarchy, the theology, the class system.
No wonder the upheaval was so devastating. The targets were all the things that the Egyptians regarded as mighty and divine. Imagine the furore – the great imperial palace was attacked, the Nile became a river of blood, the animals sickened and died. Normal living became impossible.
Centuries later the Haggadah emphasised an ethical lesson which the rabbis had recommended, the recognition that the Egyptians were human beings and despite their wickedness they deserved a modicum of respect.
The Ten Plagues, however, were a necessary tug of war which pitted the God of Israel against the gods of Egypt. It was the struggle of power as against puniness. It was proof that those who defy God are themselves defied!