My response to the recent ICE killings has been to donate $7000 to the campaign of Senator Bill Cassidy.
Cassidy is a Republican who has called for a “full joint federal and state investigation” into the latest shooting. He also voted to convict Trump in the second impeachment trial. He faces strong opposition from a Trump-endorsed opponent in the primary.
The rule of law depends rather heavily on some Republicans standing up against Trump. Supporting Cassidy seems like the clearest way to encourage that.