lambs to the cosmic slaughter

A group of people being sent into a situation where they're completely vulnerable, usually without realizing the danger that they're being in, like lambs being brought to slaughter.

Person: "STOP! LEAVE ME ALONE!"

Person 2: "GET OVER HERE!"

Person (in group): "LEAVE ME ALONE! YOU'RE DRAGGING US TO THIS PLACE LIKE LAMBS TO THE COSMIC SLAUGHTER!"