Sentence:  They were hardly likely to accept the ideas derived in part from non-Christian "philosophes" without, to say the least, some reservations, and saw in some <WSD>tolerantist</WSD> notions views which were transitory and fleetingly fashionable, and which could not be allowed to undermine fundamental Protestant truths. 
Meaning of the word marked with <WSD> tags:  An advocate of religious tolerantism.