I mean, I don't really buy this "they were all as bad as each other" argument. We're not talking about some moral assessment of the totality of German and British civilisations, but rather more specifically about WWI itself and the lead up to it. The simple fact is that Germany initiated the war (turned a "cold" rivalry hot), it invaded its neighbour, it treated civilians abonimably, and Britain's involvement in the war was in practice defensive to its ally France and took place mostly on French territory. I don't recall Britain rounding up villages of Germans and executing them.

Even when it comes to the "war crimes" stuff in this thread - something like poison gases were straightforwardly outlawed by the Hague Convention, it was Germany that first decided to "go there" and make mass use of poison gas a feature of WWI.

https://en.wikipedia.org/wiki/Hague_Conventions_of_1899_and_...