It is a Hiberno-English phrase, meaning the same as 'kid' but I expect the meaning is clear enough Confused.
You can care, I don't suggest anyone can't or shouldn't care.. but I do think it's easy to watch television and feel sad watching others suffer far away and much harder to show ongoing compassion to the suffering around you in ways that have a meaningful difference to people in pain. Time and time again, I read of callousness on MN shown to parents who have been bereaved and parents with severely disabled children, for example.
It's easy to have a caring feeling or a caring thought, and I don't think it is a bad thing.. It is good for our own mental wellbeing to care for our fellow human beings, but if it stays as a private event and you have no person to person connection, it is really about you rather than something that alleviates the suffering of the person in pain.
It may well be exercising your capacity for compassion, but we need to be clear it is not something that tangibly supports those people at the worst moments of their lives... so if you turn off because actually it's too much to bear, that's really largely irrelevant in the grand scheme of things. Maybe you are exercising your compassion about other things, or other suffering, or maybe the most important thing is that you show compassion to yourself and what you can tolerate in that moment. All Buddhist teachers are clear: if you can't find compassion for another in a particular moment, you are right to cultivate it in yourself.
Obviously, not applying this to goady trolls, who have a whole other thing going on.