You're right, it's not but that wasn't what I was asking. If they are going to claim that ICE is targeting left wing movements and then use the Minnesota 15 as an example, I would want to hear about this case. If the Minnesota 15 performed only constitutionally protected speech then this investigation might be concerning but the article didn't really describe that. Could ICE have collected evidence illegally? Yes, that can be decided in a court. I am just a layman but if it turns out that the Minnesota 15 were doing things like blocking law enforcement vehicles or throwing ice blocks, that doesn't seem like constitutionally protected speech anymore. Apparently some of them were charged with such offenses. So that might weigh on whether I thought ICE was "cracking down on left-wing social movements".
Generally the evidence seems vastly more narrow.