The ability to elect officials, who could veto laws, harmful to plebeians.
John Wycliffe is a theologian at Oxford University who spoke of the scripture which he considered to be primary in authority. John Hus was attracted by the writings of Wycliffe. Wycliffe's writings were banned and declared heretic. On 1428, his body was burned.
I'm pretty sure it was to get revenge on the Persians for their attack on the Greek people