Guru Nanak Maharaj has answered all questions already, within Guru Granth Sahib ji.
They travelled far and wide and engaged with all people and answered all questions.
Their darshan are within Guru Granth Sahib ji.
Through reading and understanding all doubts are erased.
After the aggressive proletysation that has been taken place in Punjab, it would seem that it's inevitable that there was going to be kind of push back.
However, we do not know who the assailants were and what the motives would be.