If I had the money to put it together, I'd get some pamphlets printed up, and some bumper stickers or such with statements like "I SUPPORT ICE'S RIGHT TO MURDER".
The pamphlets basically say "Since you support ICE, we thought you'd enjoy these!", then inside, some very graphic information about what ICE has been up to, and some messaging to the tone of "Do you support ICE? Because the House representatives you elected to represent your opinions in congress just voted in favor of a huge budget bill. Don't like being associated with that? Call them and let them know. By the way, the midterm elections are coming right up."
Send those out to everyone in every district whose 'democratic' representatives voted for the budget bill.