William Allen'sseminary was a threat to Elizabeth: trying to convert Protestant into Catholics, meant there would be more Catholics trying to overthrow & undermine her, meaning more rebellions.
Campion was a threat - Catholic preaching Catholicism in a Protestant country, trying to convert people. Problem for Elizabeth - more Catholics - less power she holds over them.
Ordained Catholic Priests & anyone who protected them were considered traitors & faced the death penalty.
Became legal to kill anyone who attempted assassination on Queen.