Also bear in mind that the CAF is bound at all times by international law and the laws of armed conflict
The central pillars of which are military necessity, proportionality and collateral mitigation.
This means that the military can only use military force against a military threat, so unless your protestors are heavily armed, there would be no mandate to use military force against them, so again, it isn't actually an escalation above police force to deploy the military in Aid to the Civil Power.