In the mudslinging that goes on between different, or shall we say competing, orthodoxies, one side can safely secure points by accusing the other one of being heresy hunters.
Sometimes the mud sticks. It is possible to be pre-occupied with error in a way that is spiritually unhealthy. If you start using your Bible predominatly as a text to prosecute the errors of others then you are in trouble.
Sometimes it doesn't stick, but if you throw it anyway you will make your accusers look bad, even if they are right in their assessment and motives.
There is more to theological warfare than sound arguments. Indeed, bad arguments can be very persuasive and tenacious just by using clever rhetoric.
But who ever said that killing snakes was easy?