Singapore is a Rule of Law Nation.
Everyone would receive knocks on their doors once in a while, from delivery guys to even MPs on home visits. Such are only normal.
Participation in illegal protests even silent ones is a criminal offence to society, regardless of the causes as such protests from one group will only lead to counter protests by other groups in our LONG cherished Multi - ethnic society, & hot heads would only cause conflicts & harm to others, eventually tearing upon our social fabric built up SO HARD, SO HARD by most citizens over decades, to live in peace & put food on the table for loved ones.,,
At least, SPF had only left a note of invitation to assist in investigations, to RESIST & prevent ethnic incitement
OR, do the culprits & naive supporters, from a religion hijacked by Radical Islamists where anyone who is not a Muslim - treated as infidels & have NO rights, is a target to be hurt & harmed freely anytime, PREFER to have their home door SMASHED opened in the dead of the night, troops rushing in & dragging occupants screaming in front of kids & parents, into UNMARKED black BMW SUVs, driven to detention centres that NONE knew existed & made to disappear, as is how stone cold security forces will operate to deal with anarchists?