Why is the black flag that says the sentence of Tauhid in Saudi considered the enemy by the government?

News24xx.com -  FPI leader Rizieq Shihab was questioned and was detained by Saudi security forces for allegedly placing a flag that was "similar to the ISIS flag".

According to a written statement from the Indonesian Ambassador to Saudi Arabia, Agus Maftuh Abegebriel, Rizieq was arrested in Mecca on Monday (05/11) "because it was known that there were black flags that led to the characteristics of extremist movements" on the back wall of his house.

Agus said that the Saudi Arabian government "strongly prohibits all forms of jargon, labels, attributes and symbols of anything that smells of terrorism such as ISIS, Al-Qaeda, Al-Jama'ah al-Islamiyyah and all activities that smell terrorism and extremism."

Previously, scattered photos showing a flag with a black background with a tauhid lafaz in Arabic Laa ilaaha illallah, Muhammadurrasuulallah (no god but Allah, Muhammad the messenger of Allah) were white, affixed to the wall of a house - allegedly Rizieq's residence in Mecca.

The examination of Rizieq was held shortly after there was a circulating flag burning video with tauhid sentences in Garut, West Java (22/10).

In the video, several members of the Ansor Serbaguna Barisan (Banser) burned a black flag with the words tauhid. GP Ansor General Chair Yaqut Cholil Qoumas told the media that the burned flag was "the HTI flag".

This burning triggered protests.

The Alumni Brotherhood 212 and the Ulama Fatwa National Guards Movement initiated demonstrations attended by thousands of people. The demonstration has been held twice, namely on October 26 and November 2.