The perpetrator reportedly expressed anti-Islamic views and was inspired by the actions of Brenton Tarrant, the Christchurch mosque shooter.

[1][2] According to the Internal Security Department (ISD), the suspect was a 16-year old Protestant Christian of Indian ancestry who was motivated by Islamophobia and fascinated with violence.

According to the ISD, the suspect conducted online research and reconnaissance using Google Maps and Street View on both mosques to prepare for the attacks.

[4][2][1] Following Tarrant's example, the suspect bought a tactical vest from internet auction website Carousell in November 2020, which he intended to strap a mobile device for livestreaming his attacks.

The first document was a message to the people of France in response to the 2015 Paris attacks and the 2020 Nice stabbing which advocated conflict against Muslims.

[4][2][1] Home Affairs Minister K. Shanmugam also discussed details of the mosque attacks plot and investigation during a press conference.

The Islamic Religious Council of Singapore issued a statement that the case highlighted the threat of online radicalization, and condemned acts of terror and violence "which have no place in any religion."

[13] The National Council of Churches of Singapore condemned the actions of the suspect as unrepresentative of the Christian faith and teachings and also affirmed their commitment to peaceful relations with the Singaporean Muslim community.