Men who were Catholic were guilty of treason rather than heresy, and thus were generally hanged, drawn, and quartered. Legate and Wightman were nontrinitarian and technically protestant.

I would hazard a guess that he wasn't a fan of the parliament, considering where he was found. That said, I do understand those ruling the country at the time were pretty horrible. I still don't agree with his and his compatriots' methods, nor do I trust that their rule, had they succeeded, would have been benevolent rather than the same, but bad for Protestants instead.