Zwingli, Martin Luther, John Calvin, and the Tudors were.
QV also:
"Roman Catholics and Protestants alike persecuted the Anabaptists, resorting to torture and execution in attempts to curb the growth of the movement. The Protestants under Zwingli were the first to persecute the Anabaptists, with Felix Manz becoming the first Anabaptist martyr in 1527. On May 20 or 21, 1527, Roman Catholic authorities executed Michael Sattler. King Ferdinand declared drowning (called the third baptism) "the best antidote to Anabaptism". The Tudor regime, even the Protestant monarchs (Edward VI of England and Elizabeth I of England), persecuted Anabaptists as they were deemed too radical and therefore a danger to religious stability.
The burning of a 16th-century Dutch Anabaptist, Anneken Hendriks, who was charged with heresy.
The persecution of Anabaptists was condoned by the ancient laws of Theodosius I and Justinian I which were passed against the Donatists, and decreed the death penalty for anyone who practised rebaptism. Martyrs Mirror, by Thieleman J. van Braght, describes the persecution and execution of thousands of Anabaptists in various parts of Europe between 1525 and 1660. Continuing persecution in Europe was largely responsible for the mass emigrations to North America by the Amish, Hutterites, and Mennonites. Unlike Calvinists, Anabaptists failed to gain recognition in the Peace of Westphalia of 1648 and as a result, they continued to be persecuted in Europe long after that treaty was signed.
Anabaptism stands out among other groups of martyrs, in the fact that during the reform in the 16th and 17th centuries, 30 to 40 percent of martyrs were women."
SOURCE