"No one is free until we are all free." ~MLKJr.
This powerfully pith message about freedom and compassion being essential for all; even when some reap from its absence; holds many truths IMO.
Consider when one has injury or screwy tissue in any part of one’s body, it can end up weakening the whole organism.
In mindfulness a single thought can corrupt an entire day or more!
Cancer works this way too.
Any functional system needs a total of its/theirs/his/hers/your parts to sustain balance and health.
In society, until those treated as expendable enjoy the same honest, trustworthy, full and equal rights and protection as everyone else, we are ALL subject to the whims of the oppressor. Who will be next?