I think both options are good, ww2 heroes is good for honoring those people, but they should be rather premium vehicles, event or battle pass ones. For regular TT i would prefer chille or turkey, other great option is India, but not as sub tech tree but full allied TT.
polish tech tree
yes and no thats very complicated. If you look it has the Polish flag and not the UK flag. They gave alliegance to the Polish government and to the King. So if you wanna think about it in another way, it was like Austrailia or Cananda where the country has alliegance to the king but has a seperate government. Could say Poland was a commonwealth country for like 7 years
specialized export for kuwait and jordan, neither used by UK
made and developed by TAI, based off A-129.
Pretty sure Centuaro I 120 isnt used by Italy, also specialized export.
Imma be honest I have no clue what point you were making or what the arguement is about but im here a year later to ragebait.
Either way Israel should get native low tier first which it has plenty of vehicles for and then we think about subtree later, maybe latin american country