Mysterious

Something has been troubling me for some time.

Whenever a watermelon says we need to build nuclear power stations, many of their friends say nothing or even nod, because that's the newly-approved way to save the planet.

When anyone else says it, they howl and mobilise their battalions, crying that it would mean the end of the planet.

How does that work? It surely could not be that only the Righteous may speak of such things, as with racism. Could it?