Extremism is so easy. You’ve got your position, and that’s it. It doesn’t take much thought. And when you go far enough to the right, you meet the same idiots coming around from the left.
This is a friendly reminder for us to avoid dogmatism, no matter how strongly we believe our ideas. Or as the Buddha said, always question what others preach. Test it yourself, and base your beliefs on your own clear experience.
Do not be misled by report or tradition or hearsay. Do not be misled by proficiency in Collections [of Scripture], not by mere logic and inference, not after considering reasons, nor after reflection on some view and approval of it, nor because it fits becoming, nor because the recluse [who holds it] is your teacher. But when you know for yourselves: These things are not good, these things are faulty; these things are censured by the intelligent; these things, when performed and undertaken, conduce to loss and sorrow — then do you reject them.