a matter of opinion... with Charles I I'd say not really, the people had much than that against him, but he was suspected (wrongly) of Catholic leanings. With James II, it was a strong reason for the opposition to him. Don't know about the 18th century; if you mean the rebellions of 1715 and 1745, no, I think religion wasn't really the issue; the Hanoverians had become well entrenched and accepted and nobody, ate least in England, had any desire to return to the previous dynasty.