Some Lebanese say Thursday's deadly violence underscores the need for militias to disarm, in accordance with UN Security Council resolutions.
The party has proved time and again that its allegiance does not lie with Lebanon and its people but rather with Iran and its supreme leader.
Iranian taxpayers have been footing the bill for the IRGC's overseas operations amid Iran's economic crisis, fueling domestic discontent.
Powerful Iran-backed factions are thought to be behind ongoing attacks on activists and on Iraqi and international coalition targets.
Anbar paramilitary commander reportedly gave the order to kill prominent activist Ihab al-Wazni, who was assassinated in Karbala in May.
Demonstrators carried banners bearing the slogan, 'Who Killed Me?' demanded justice for slain Iraqi activists and journalists whose deaths are blamed on Iran-backed militias.
Hurt by the domestic and international ramifications of the IRGC decisions, the Iranian people are growing increasingly disillusioned by the regime.
An Iraqi journalist remains in critical condition following an assassination attempt that came 24 hours after a prominent activist was killed. Protests broke out in Karbala, al-Nasiriya and Diwaniya.
The resolution calls for the disbanding and disarmament of all militias, in implicit reference to Hizbullah, and affirms Lebanon's sovereignty.
UN rights experts also called for an 'independent and impartial investigation into allegations of torture' against the three facing sentences.