Czech republic AKA Czechia is a 30 year old country which never had been part of USSR or Warsaw pact, only NATO and EU.
That said, Deathmisser mentioned Praga which is not a Czech vehicle, but a Czechoslovakian one. On a similiar note, the Slovakian Mig-29 new marketplace camo should have been added for the German one, not the USSR one.
Not until 1968 when Soviets together with Warsaw Pact invaded us. There was indeed a communist coup in February 1948 that got commies into power and the state changed from democracy to totalitarian puppet regime run with orders from Moscow,yet was still quite independent until the said invasion of August 1968.
Neither Turkish players nor Israeli players would be happy with Turkey being a subtree within Israel.
There’s is absolutely no reason beyond that for Turkey to be a subtree to any nation though, the best approach is the existing one: add their unique modifications of existing vehicles within the parent tree of that vehicle. (Turkish M60 being in US tree, Turkish T129 being in the Italian tree, etc)
Turkey does have a lot of Israeli technologies, such as the sabra tank, the TB2 drone and M60T upgrades. With that being said, Turkish vehicles as event/premiums in actual nato member trees is more plausible.