Sentence:  Be they what they may, the barbarities of the Catholics of those times had their limits: but of this <WSD>abhorrer</WSD> of Catholic barbarities, the barbarity has, in respect of the number of intended victims, no limits other than those of time. 
Meaning of the word marked with <WSD> tags:  One who abhors. (Early 17th century.)<ref name=SOED>(page=4)</ref>