The "throne (sovereignty)" is an allusion to the control of...
The "throne (sovereignty)" is an allusion to the control of the affairs of Mecca and the entire region, meaning that the tribe of Hashim controlled the entire region by virtue of the Message of Islam and that Muhammad (PBUH&HF) is the chosen Prophet, but really there was no revelation and there was no message!!! That is Yazid's opinion of Allah (SWT), Islam, and the Prophet (PBUH&HF). His father, Muawiyah, and his grandfather, Abu Sufyan, were no better.
At the beginning the reign of Uthman when Umayad occupied the prominent positions, Abu Sufayn said: "O Children of Umayyah! Now that this kingdom has come to you, play with it as the children play with a ball, and pass it from one to another in your clan.
We are not sure whether there is a paradise or hell, but this kingdom is a reality." Sunni references: al-Isti'ab, by Ibn Abd al-Barr, v4, p1679 Sharh Ibn Abil Hadid, v9, p53 which quotes the last sentence as follows: "By him in whose name Abu Sufyan swears, there is neither punishment nor reckoning, neither Garden nor Fire, neither Resurrection nor Day of Judgment!" Then Abu Syfyan went to Uhud and kicked at the grave of Hamza (the uncle of the Prophet who was martyred in the Battle of Uhud in fighting against Abu Sufyan) and said: "O Abu Ya'la!
See that the kingdom which you fought against has finally come back to us." (Sharh Ibn Abil Hadid, v16, p136). Now let us see what his son, Muawiyah, said when he took over the Caliphate: "I didn't fight you to pray, fast, and pay charity, but rather to be your leader and control you!!!" This is an indication that Muawiyah never cared about any of Islam's mandates, nor Allah's (SWT) orders; rather his war was politically motivated to gain control of the whole region and take over the Caliphate.
It is no wonder or surprise! Muawiyah poisoned Imam al-Hasan (AS), the greater son of Fatimah (AS) -- the daughter of the Prophet (PBUH&HF). Sunni references: Tadhkirat al-Khawas, Sibt Ibn al-Jawzi al-Hanafi, pp 191-194 Ibn Abd al-Barr, in his "Seera" Abu Nu'aym Also reported by the traditionists such as al-Suddi and al-Sha'bi.
Then Yazid, the Muawiyah's son, slaughtered Imam al-Husain (AS), in the desert of Karbala in Iraq, and ordered that Imam al-Husain's (AS) head be carried on a spear and displayed in towns for people to see it! May Allah avenge the Prophet's family!!! May Allah avenge the Prophet's family!!! May Allah avenge the Prophet's (PBUH&HF) family!!!