If you happen to see a cop in public and it's a totally neutral situation, thank them for their work and tell them you really hate how the actions of ICE are making their job to apprehend actual criminals harder and damaging their reputation among the neighbors they serve.

No, you don't need to believe a single word of it. It's about planting seeds. The police lie to us all the time. This is lying for the greater good. Propaganda isn't just for the ruling class.