No, a pilot who, through either arrogance or political pressure, igonored repeated warnings that the fog was below minimums and attempted a landing is what brought down (Polish) president's plane.
Exactly. Even if the fog was artificial, no one forced the pilot to fly his plane into the ground but him. If he couldn't see, he shouldn't have attempted to land. I suspect he was afraid he would lose his job if he refused to land. It is my understanding the Polish president had fired a previous pilot that had refused to land during similar circumstances.
There was no repeated warnings, read the transcripts before making dumb statments.