Was Oliver Cromwell a tolerant man?

Answer 1

Yes, if "toleration" is the word you are meaning to use. He granted more liberal policies toward non-Anglicans than at any other time in British history. But they were only short-lived. By 1673 Catholics were barred from taking office via the Test Act of 1673. See: Andrew R. Murphy. Conscience and Community: Revisiting Toleration and religious Dissent in Early Modern England and America

Answer 2

Yes and if you look at BBC History you will find out why