I see three possibilites:
1. Sydlik actually was overcome by emotion and genuine care for the brothers and sisters.
2. Sydlik was putting on a performance, a very cynical attempt at pulling on heartstrings of attendees.
3. Sydlik knows the gig is almost up, and that the Borg is in deep deep trouble, and that his life has been wasted following a dream.
1 is very doubtful, 2 is the most likely, but just maybe its number 3... Or all of the above.