Why do Democrats want to unmask ICE agents?

Why do Democrats want to unmask ICE agents? And not the criminals like Antifa, etc.? Sad but true -- to lead to violence against Federal agents.
"HSI says 43-year-old Matthew White of Jamestown, NY, posted on X about an ICE agent:

"I can't wait to put a bullet into his brain, but first his children."

HSI says White also made other threatening comments, including responding to a video of border czar Tom Homan by saying:

"Then understand if your ICE agents don't show proof of identity and a signed warrant, we will kill them.""
Link: https://x.com/BillMelugin_/status/1942630485982863812
h/t: @BillMelugin_