Again it is the Thai taste that matters and not the individual ingredients. The history of Thai food is very creative. Asian food uses what is at hand, varying with the seasons. Thais have incorporated many foreign ingredients into their cuisine. For instance the chile pepper arrived only in the 16th century via South America.
Peanuts are also a foreign adaptation.
Even fish sauce they say has ancient Mediterranean roots. A cuisine is the taste preferences of a people-Thai, Vietnemese, American, etc. Thai food is totally different than Vietnemese food even though the ingredients are very similar. Even today Thai chefs are incorporating Western ingredients into Thailand's cuisine. An artist can paint on anything, not just canvas.