If he was advocating for ICE to kill peaceful protesters with "live rounds", then this would violate our rules. However, since the thread is about a group of protesters who undertook violence against a federal facility and personnel, including shooting a responding officer in the neck, they are no longer peaceful, and can fairly be construed as criminals-- arguably even terrorists since there is a political angle, here, yes.
@oldshadow isn't clear about exactly who should be targeted, but in that context, and because he used the term "terrorists", I think it may be fairly assumed it was this group.
Voicing support for potentially lethal force against criminals attacking federal officers is fair game. That was true in our January 6th threads. The posters who condoned Ashli Babbitt getting shot, or declared gleefully their hope others who might commit a similar offense in the future would be treated the same way, were staying inside the lines.
That being said, let's not get carried away. Be very careful in calling for indiscriminate, murderous violence against any group.