Not at all.
If some ascribes to a political ideal or a cultural persuasion or a value based system that does not align or mesh with yours...then you ought to be on the backfoot with them from the outset.
A radical funadamentalist Chrisian that would see me and all non-practicing Christians condemned to the afterlife and rather more quickly than our used by date, is not inherently wrong with every thought and utterance BUT such utterances MUST be viewed against the context of their viewpoint. If they say as an isolated soundbyte. "All humanity are god's children". then you have a right to say "Fabulous but did you not say 10 seconds ago that all that did not worship Jehova be thrown into the darkest hots pits of hell...or whatever"
It is all relative.
If a Christian Fundamentalist who has never overtly endorsed such preachings says something nice and wise, you similarly can say "Good, great, so you disagree that we ought to be cast into hellfire and be tormented in eternity?'
If though the person had no such conviction and never made any affirmations one way or the other you would not question their standpoint...would you?