Sentence:  In this connection , it has been observed that the increasing number of Irish Catholics , priests and laity , in England , while <WSD>certainly</WSD> seen as good for Catholicism , is nevertheless a source of embarrassment for some of the more nationalistic English Catholics , especially when these Irishmen offer to remind their Christian brethren of this good . 
Meaning of the word marked with <WSD> tags:  definitely or positively (`sure' is sometimes used informally for `surely')