In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Ameerul Mumineen Umar Ibnul Khattaab [radiyallaahu-anhu] said:
People were [sometimes] judged by the revealing of a Divine Inspiration during the lifetime of Allah’s Apostle but now there is no longer anymore [new revelation]. Now we judge you by the deeds you practice publicly, so we will trust and favour the one who does good deeds in front of us, and we will not call him to account about what he is really doing in secret, for Allah will judge him for that; but we will not trust or believe the one who presents to us with an evil deed even if he claims that his intentions were good. [Saheeh Bukhaari: Vol 3; Hadith Number: 2641]
Imaam Abdul-Azeez Bin Baaz [rahimahullaah] said: “Whoever manifests good, it will be accepted from him and a good suspicion is held about him. And if he manifests evil, it will held against him and an evil suspicion is held about him”. [An Excerpt from Al-Hulalul Ibreeziyyah Min At-Taleeqaat Al-Baaziyyah Alaa Saheeh Al-Bukhaariy page:397 Vol 2 footnote 1]
Shaikh Rabee Bin Haadee Al-Madkhalee [may Allaah preserve him] said: Destructive Good Suspicion is to have a good suspicion of the people of falsehood whether are they disbelievers, innovators or evil (open) sinners. And that which led the disbelievers to belie the Messengers, (harbouring) a severe disbelief in them and their message was due to their evil suspicion towards the people of truth (i.e. the Prophets and their true followers), and having a good suspicion of their forefathers and their religions of falsehood and disbelief. Ahlul Bidah such as the Rawaafid, the khawaarij, the soofiyyah, the murji’ah, the qadariyyah and the people of Tahazzub Al-Baatil [false partisanship] are destroyed by good suspicion towards their shuyookh and figureheads, and their corrupt creeds. On the other hand, they are destroyed by their evil suspicions towards the truth and its people. Abul Hasan Al-Maribee and his followers have a share of both this destructive good suspicion and destructive evil suspicion. [Majmoo 13/363-364]