Re: Why did Odo send Laas to the Great Link?
Its his people.
That he shares biochemical characteristics with the Founders doesn't make them his people. Family isn't about DNA sequences or physical traits. It's about finding individuals with whom one can identify. You've provided absolutely no evidence that Laas actually empathizes with or accepts the Great Link in even the smallest degree.
"Many things seem clever to an imbecile." --Captain Thelin th'Valrass, USS Enterprise-- "The Chimes at Midnight"