What does that mean?

Nothing, it's just an empty platitude that can be used for justifying any kind of abhorrent act against "others".

It's why it's so effective as a rallying cry, it means nothing substantial, can be molded into whatever the speaker wants it to mean, it's an empty vessel for the bearer's hatred.

	▲	DrProtic 2 hours ago \| parent [-]
		So you’re accusing me of abhorrent acts based on what I said? Did you think of that word salad yourself or you copied it from somewhere? So you’re being extremely unjust by accusing me of something while presenting yourself on the moral high ground? Checks out.