How the seeds of Humza Yousaf’s downfall were sown before he became Scotland’s leader

Humza Yousaf made headlines around the world when he took over as Scotland’s first minister in March last year.

He was, as newspapers from the Times of India to the New York Times pointed out, the first Muslim to become the leader of a Western European nation.

But to Scots, he was already one of the most familiar politicians in the country, having first been voted into the Holyrood parliament in 2011 and...