How to avoid doubt

I was surprised to read recently that internationally-renowned speaker and author Richard Foster - someone whose profound and thoughtful books are praised by people as diverse as Dallas Willard and Delia Smith (and many others in between) - is apparently an anti-christian false prophet, bringing evil into the body of Christ ( "The cult of guru Richard Foster" ).

It made me think - If you want to avoid the uncomfortable state known as 'doubt,' then here's a great tip for y'all: Discount anyone who thinks differently to you, and deny that there's integrity in their thought process. Of course doing this is easy - just make sure you don't listen to them, or, if you do, don't do it kindly. If you can label them with terms like 'apostate' 'heretic' or 'cult leader' then even better.

The trouble is, I think it's very difficult to do this to someone and love them at the same time. You can certainly love someone and disagree with them - but to disagree with someone lovingly involves understanding them, seeing where they are wrong, and challenging them incisively. It doesn't involve waving the heretic stick at them and bundling them off to 'you're talking nonsense' land.

So, if loving people means listening to them, and understanding them, and acknowledging that their point of view could be as coherent as yours... it means loving people also means being open to challenge... which means - being loving necessarily means doubting sometimes?