Abu Hurairah Allah be pleased with him narrated that the Messenger (PBUH) said:
"Beware, avoid conjecture, conjecture is the worst falsehood.”
[Al-Bukhāri and Muslim, Riyadh As-Saalihin, Ch.272, On Interdicting Harbouring Suspicions Unjustly Against Muslims, Hadeeth 1573]
Conjecture is when one guesses, based on appearance of a situation and not on proof. As Muslims, we are discouraged from working with conjectures. Things that are not the facts.
A lot of our problems and conflicts and misunderstandings today, are deeply rooted in conjectures. Based on ill suspicions and its derivatives.
As Muslims, we must learn to speak and work with facts and proofs. We must show knowledge in what we say and do.
It is compulsory to respect the Mushaf - the book of Allah. To disrespect the Mushaf can tantamount to Kufr & leaving Islam. Ibn Nujaym rahimahullah states that respecting the Mushaf is an Ibadah in itself & disrespecting the Mushaf is Kufr. (al Bahr al Ra'iq 2/34)