I haven't really read everyone's response...but here is my take...
was it insensitive & just unnecessary? Yes.
Worth fighting over? No.
As to the unconditional part...
For me, obesity IS a deal-breaker. Unless it is like some extremely rare disease that truly is causing the person to uncontrollably gain weight...then I would still love them. But for me, health is my job & my passion. Unfortunately, obesity is a side effect of being unhealthy & it is the unhealthiness that bothers me. If my bf told me he was never gonna work out again & was just gonna stop caring about what he ate, I would honestly, 100% break up with him. Not only does that clash way too much with my lifestyle, but I would also find it inconsiderate to me & him. When I'm older, I want to be able to stay active & travel...that just would be highly reduced if my partner was super unhealthy. I also know how many horrible side effects there are to obesity & really do not want my life to be spent taking care of someone who just neglected to take care of themselves.
This does not mean that I would not take care of a loved one if something totally out of their control happened (such as a spinal cord injury or something), or they got really sick. the CONTROLLABLE aspect of it to me is what makes it something that could be a deal breaker. I have gotten on my ex-bf's back for not working out, and would not hesitate to do it again in a future relationship. In turn, I would hope that my partner would get on my back if I started gaining weight & stopped working out.
Just wanted to add...as hard as it is to separate...the gaining weight thing has nothing to do with LOOKS. I'm fine with balding, aging, whatever. I absolutely don't think looks should be a condition of love