Truthfulness is indispensable to hadith transmission. If credible evidence establishes that a person regards fabrication in religious reports as permissible to promote a cause, the basis for trusting that person’s transmissions is gravely undermined.
This is not merely a difference of opinion or an ordinary lapse in precision. It concerns the integrity of the act of transmitting a report. However, the allegation itself requires sound evidence and must not be inferred from an adversary’s rhetoric alone.
A truthful narrator with a mistaken view is not equivalent to someone who permits lying in reports. Sound criticism depends on preserving that distinction.