This one short comment shows several of the classic Palsbara tactics. Let's dissect it, shall we?
When it comes to the "right of return" (in this case, but really for anything the Palestinians want):
1. "Everyone" supports it (other phrasings: "the whole world agrees")
2. It's a right (just like the Palestinian right to kill Jews and get free stuff)
3. It's enshrined in international law (you know, the international law that Hamas and Fatah honor so much when they fight Israel).
4. And if you don't support it, you're a racist.
All four of these talking points show up in every HP Israel thread and are repeated ad nauseum. Recognize them, so you can combat them.