Why would people want to murder lord darnley?

People may have wanted to murder Lord Darnley due to his contentious relationship with Mary, Queen of Scots, and his perceived threat to her power. Darnley's ambition and desire for a greater role in governance made him unpopular among the nobility, who feared his influence. Additionally, his involvement in scandal and his volatile personality contributed to the animosity against him, leading some to view his assassination as a means to stabilize the political landscape.