The Servetus case - An appeal for a new assessment

This book describes the trial in Geneva of Michael Servetus, a talented man, which ended in a tragedy : on 27 October 1553 he got burnt at the stake. Who or which institute was responsible ? Frequently one hints at Calvin, because he allegedly controlled Geneva in that time. In the sources, however, then Calvin had to fight as a Trojan against the combined forces of fierce factionalism, xenophobia against refugees, ridiculisation of the ministry, popular anger and fear.
Geneva's Council followed a wavering course, which caused a deadlock that some tried to break by a consultation of their reformed allies (the city-states Basel, Bern, Schaffhausen and Zürich). In the midst of the power struggle Servetus had joined hands with the Enfants, a pressure group, and from hindsight this move was desastrous. Might Servetus, who as a Spaniard was unaware of the specific circumstances, have known ? There exists a thread that he was more in the know than one would expect from a foreigner.