Does one who openly insults Abu Bakr al-Siddiq and 'Umar ibn al-Khattab (may Allah be pleased with them both) become a disbeliever?

Question:
He says: Honorable Shaykh, may Allah grant you success, does the one who openly insults Abu Bakr al-Siddiq and 'Umar ibn al-Khattab (may Allah be pleased with them both) become a disbeliever specifically, or not?

Answer:
They cast a shadow with this cursing of Abu Bakr or 'Umar; they cast a shadow, but the matter of these people did not stop at cursing Abu Bakr and 'Umar. Rather, they associated partners with Allah, worshipped the people of the house, and built shrines over them. They slaughter animals and make vows to them, circumambulate their graves, and perform Hajj. The matter did not stop at cursing the Companions or at the issue of the caliphate. And even though this is clear misguidance, they reached shirk (associating partners with Allah) and kufr (disbelief). In fact, they said that our imams are better than the angels. They say our imams are better than the angels; no angel near to Allah and no prophet sent by Him is equal to them. Yes.