Sentence:  But the "Tenderneſs", we have to deal with, is quite of another Nature, being ſuch as one as makes Men <WSD>ſcruple</WSD> at the Lawfulneſs of a Set Form of Divine Worship, at the Uſe of ſome Solemn Rites and Ceremonies in the Service of God; but makes them not ſtick at all at "Sacrilege", which St. "Paul" equates to "Idolatry"; ... 
Meaning of the word marked with <WSD> tags:  To hesitate or be reluctant to act due to considerations of conscience or expedience.