I think I would be pretty freaked out if my current (or any past) therapist expressed love towards me. Empathy and even compassion are great in a client/therapist relationship. Love? Not so much. Actually, some professional competency and skill would be best.

I agree with divine that the author of the blog post sounds arrogant and condescending. And does he really think he can help people by just loving them? Serious mental illness is, well, serious. So are traumatic circumstances. You can't make those things disappear with just "love." Life is not some sappy movie where people are cured just because someone cares for them.