I've noticed several posts recently claiming that JW friends and family members give out conditional love. Well, I'm not so sure that is entirely accurate, in fact, I would say they tend to be very steadfast in their love. The issue is this, they have been taught a poor form of love. They have been taught that by shunning us they are showing us love, as twisted as that may seem. They consider it loving to press everyone into a certain mold that will ensure their survival.
This is all perfectly understandable when you remember that their highest example of love, is the God of the Bible. A God who claims to love mankind but at the same time will quickly deal out punishment for any tiny transgression, and sometimes even going so far as to take it out on people who are completely innocent. (The people of Isreal dying for David's census taking.) Their God doesn't show the sort of love that allows him to accept us for our failures, rather he has to make us all "perfect," or kill us. He offers no middle ground. So is it really any surprise that they try to do the same thing by any means necessary? So no, it's not that their love is conditional, they just don't know how to really love and accept someone, they haven't been taught to.