Why were people against the execution of Mary queen of Scots?

Opposition to the execution of Mary, Queen of Scots, stemmed from several factors, including her royal status and the potential political ramifications. Many viewed her as a legitimate heir to the English throne, which made her execution a contentious act that could provoke unrest among her supporters. Additionally, her execution was seen as a betrayal of the principles of mercy and justice, particularly in a time when the monarchy was expected to uphold noble values. Lastly, executing Mary risked inflaming tensions between Catholics and Protestants in England and abroad.