If you can’t defeat the enemy, take his side?

This statement is a bit of an oversimplification and it depends on the context. Generally speaking, it is not advisable to take the side of the enemy if you can't defeat them. Doing so could mean compromising your values and beliefs, and it could also mean that you are helping the enemy achieve their goals.

However, in some contexts, it may be wise to take the side of the enemy if you can't defeat them. If the enemy is too powerful to be defeated, it may be best to try to negotiate a peaceful resolution or reach a compromise that works for both sides. This could involve taking the side of the enemy in order to reach a mutually beneficial agreement.

In addition, it may also be wise to take the side of the enemy if the stakes are too high and there is a risk of significant loss of life and destruction if the conflict continues. In this case, taking the side of the enemy may be the only way to prevent further suffering and destruction.

Ultimately, the decision to take the side of the enemy should be made carefully and with consideration for the context. It is important to weigh the potential risks and benefits of doing so before making a decision.