Is it permissible to distribute a pamphlet that includes details about prayer which contradict the prevalent madhhab in the region, such as grasping (the hands) after rising from rukūʿ, while fearing the incitement of discord, or should it be amended while preserving what is established in the Sunnah?

There is no harm in amending the pamphlet and removing what is a matter of scholarly disagreement and is not supported by strong, clear evidence, especially if its publication before amendment could lead to confusion and debate, and its publication after amendment would lead to correcting people's mistakes in prayer. The issue of qabd (placing hands) after bowing is a matter of disagreement, and there is latitude in the matter. This issue should not be an obstacle preventing the dissemination of the good contained in the pamphlet.