especially if they were arrested only for opposing the regime (as opposed to terrorism)
Many of those being released have attempted to kill Jews; they should have received the death sentence long ago.
JERUSALEM RESIDENTS BEWARE! Terrorists Who Attempted Murder May Be Released To Their Homes
By halacha, killing non-combatants is only allowed if Ha-Shem, or at least a Navi, or at least a Kohen Gadol with Urim ve-Tumim says its okay.
Source in Shulchan Aruch?