The basis is in what they experienced in their past. That made the story they told themselves. Whatever one finds on tv, radio on internet that confirms that is true, the rest is false. I think the neo-liberal of a retreating government, privatised institutions and a growing inequality between the haves and dont haves is what formed the foundations of today's declining trust in that same government. So covid stands not in itself, but rather brings up underlaying currents which where already there.