What will happen if the tunnel of Gibraltar is built? 13 km is nothing. What would Israels part as a strategic country be if you opened up another land road under sea from Afrika up to Europe? If Catalonia leaves 20% of Spains GDP goes away. Maybe Spain and UK (who are leaving EU and are in control of Gibraltar) would get some stupid idea to go on with building the tunnel. That would bypass Israels position as the only land strip from Africa to get goods up to Europe and what if you can´t get custom duty for goods being transported . You can learn a lot from reading the history books. Israels strategic position if the tunnel is built would be? Read the Balfour deklaration it gives away a lot of clues. I guess that Russia already are in support of building this tunnel and the independence of Catalonia.