Every time this comes up, my answer is the same and it's always right.....
Cities do not win championships, FRANCHISES do. No self-respecting Los Angeles Laker fan lays claim to those 5 Minn. championships. As a matter of fact, at Staples Center those 5 titles are consolidated on to one banner with Minn. prominently written on said banner alongside the 10 championships that were won here in Los Angeles.
Contrary to your thinking, the city of Boston has no claims to the 17 titles that have been won by the franchise known as the Boston Celtics. If Wyc decided tomorrow to move the team to Denton, Texas the titles go right along with him. You get the memories, the franchise gets the hardware. It doesn't matter how many generations of Celtic fanatics your family goes back to, you're just fans in a city that the franchise currently resides in. Facts aren't always warm and fuzzy, I know.
The only people who still subscribe to your theory are fans of a team who are desperate to keep a rapidly closing title count from getting any closer.