Abelleh -“Health: It’s a machlokas whether establishing a Madina is a mitzva Di’Oraisah. The Ramban says yes; the Rambam says no. HOWEVER, KOLEI ALMA LO PLIGEA THAT ONCE WE HAVE A MADINA YOU CAN’T GIVE IT UP!”
Of course you can give it up! The only reason the Gedolim were against giving it up was because they were so scared that if given to the arabs -that they would take revenge. If you find a country that Jews blood won’t be spilt -why can’t you give it up?
Turkey likes Jews, not Zionists though!