Some homework reading should be a recommended prerequisite before even gathering questions for a such interview, and I guess that answers to most questions about that can probably be found in these previous discussion threads
http://forum.xbmc.org/showthread.php?tid=117995
http://forum.xbmc.org/showthread.php?tid=171518
http://forum.xbmc.org/showthread.php?tid=186998
Short answer; XBMC is legal, however some third-party addons that are not in the official repository does violate copyrights making them illegal in many countries, but that does not mean that XBMC itself was designed only for piracy.
As discussed in those threads, main problem are the people selling media players with such addons pre-installed, which in sometimes gives many buyers of those the false belief that they are what XBMC if for.
You could compare it to someone selling a cracked/jailbroken Xbox360, PS3, or Wii with several pirated games pre-installed with a nice loader or those games, or someone selling an iPod / MP3 player pre-loaded with pirated music.
Someone selling cracked game-consoles pre-loaded with pirated games does mean Microsoft, Sony, or Nintendo support piracy, just as Apple is not to blame if someone would sell iPods pre-loaded with pirated music.
And the same goes with XBMC, it does not endorse other people assisting people to pirate, however XBMC is an open platform so it does not need to be jailbroken, unlike products from companies like Microsoft, Sony, or Nintendo.