Whoever speaks ill of the (righteous) scholars, Allaah will give death to that person’s heart before He will give death to that person
The innovators are like the scorpion, he buries his head while leaving his tail out, such that when he is able to, he stings
It is not permissible to take [knowledge] from an ignorant, from someone who has deviancy in ‘Aqeedah and from an innovator or deviant even if they are called scholars
As for the interpretation of the Salaf as-Saalih then that is how we interpret, and what they acted upon is which we act upon, what they left off is what we leave.
Do not be hasty regarding that which you hear from the people, particularly in later times, and the large number of people who speak and give rulings and who stand to give knowledge and speak.
One must always pay the “zakah” of knowledge. Stand up for the truth, always command the good and forbid the evil. Weigh between the benefits and harms of every decision.