That train left the station.
They already look cruel, heartless and evil.
Yes but for now they can rationalize to themselves and other big government fans that their actions were noble, sparing the child needless suffering. But only if the baby hurries up and dies before even their supporters begin to wonder if they are actually monsters. If he lingers or, god forbid, actually lives then the whole system gets a black eye. In their minds, better one baby be murdered than their apple cart get upset.
So their not just cruel and heartless, they are indeed evil. But I'm sure they don't see it that way, they likely say we are evil for fighting to keep this baby alive and threatening their entire death panel system.