Conclusion
In conclusion, we will present a shia hadith, which is enough to let you understand the whole story.
Imam Al-sajjad (as) said: If you see people of suspicion and innovation – other than shias or new shia – then show disownment from them and abuse them much, backbit them, make false accusations on them – that is, backbite them by attributing lies on them and make false accusations on them ('Buhtaan')[tanbiah al-khawatir v.2 p.162 – wasael al-shia v.11 p. 508 – Nahj al-intisaar p.152]