Hadith.4425 - The Prophet, peace and blessings be upon him and his family, said:
"Two groups from my nation have no share in Islam: those who harbor enmity against my household and declare war against them, and those who are extreme in religion and deviate from it."
Whoever deems it lawful to curse the Commander of the Faithful, peace be upon him, rise against Muslims, and kill them, is prohibited from marriage because it leads to destruction.
The ignorant may assume that every dissenter is a Nasibi, but this is not the case.