When the U.S. warned Turkey against purchasing the Russian S-400 air-defense system, the Erdoğan administration chose a stance of tough defiance—a move that made some people proud, viewing it as a display of governmental strength.
What you fail to understand is that national interests and security are not protected by emotions
Of course, you also need to be aware of the prevailing situation in the region since 2013
Read this carefully now so you understand the situation; very few people on this forum can explain this to you, I am doing so.
1 -- since 2011 , Turkiye has wanted to purchase PATRIOT Air Defense System from the US, but the OBAMA administration did not sell them to Turkiye
and in 2013 , An asymmetric war between the US and Turkiye began over Syria and Libya
-- Israel destroyed MOURSI in Egypt via military Coup by SISI in 2013
-- Israel-USA backed FETO Organization has started judicial coup attempt against ERDOGAN in 2013
2 -- Turkiye was set to purchase the HQ-9 air defense system from China, but the US misled Turkiye and ensured the cancellation of the deal at the 2015 NATO summit held in Antalya/Turkiye
The US, which once again failed to keep its promise to supply PATRIOTAD System to Turkiye but USA used FETO in 2016 to orchestrate a military coup attempt against ERDOGAN
Thereupon, the Turkish Army entered Syria despite the US and launched a military operation against USA-France-Israeli-backed terrorist organizations.
3 -- At the same time, a multinational alliance mobilized against Turkiye in the Eastern Mediterranean in 2016
in 2017 , Turkey, which had no air defense systems in its inventory, signed an agreement with Russia to purchase S-400s to meet an urgent need
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Even France blocked the 2018 project with EUROSAM to develop a new air defense system with Turkiye in 2020, simply because Turkiye had launched a new military operation in Syria
-- Turkiye won in Syria and Libya; the demands of the USA which had used the F-35 as a political card are no longer relevant
-- Turkiye has developed its own STEEL DOME Air Defense Umbrella ( HISAR+SIPER )
There is no longer much need for the S-400s.
In reality, the USA wants to supply F-35s to Turkiye, but Israel is trying to block the sale by whining day and night ... and then there is Greece, also whining.