Those who are sucked into big adversarial situations in history always run a number of risks. However, the biggest risk, I believe, is to have an evil adversary and end up looking, behaving and even thinking like them. If that happens to anyone, they could be sure that even if they win many battles, they would end up losing the war. In contrast, one might be lucky enough to end up resembling an adversary that is better than oneself.
The effect that “the other” has on one has been observed throughout history, even at the level of great empires. When ancient Rome and Iran became adversaries each learned a number of things from each other. Rome was a republic in conflict with Iran, a monarchy. When Marcus Licinius Crassus, in his time the greatest of Roman generals, was killed by the Persians in the battle of Harran in 53 BC, the Roman elite started thinking of adopting the monarchic system which they eventually did under Julius Caesar. At the other end of the spectrum, unlike the Romans, Iranians did not have a standing army. In time, however, they decided to imitate their adversary by creating precisely such a war machine.