Part's of that are not entirely true. While the British East India Company had a policy of not getting involved in religious matters, there still were British officers who banned the practice. The British would outright ban the practice, first in Calcutta and then in the rest of India. It is true that Caste is a Portuguese word, but it's origins are thousands of years old.
Also, the concept of the First, Second, and Third comes from the Cold War, 1st being NATO, 2nd Being the Warsaw Pact, and 3rd being everyone else.
Pilfering funds meant for the upkeep of widows led to a direct increase in the practice, which was otherwise rare & religiously discouraged.
Indiafacts has a few good articles among other places.
Caste refers to a system of blood purity while Vedic society has Varna and Jati.
Neither of the three are related.
India has not had self-rule for most of the last millennia, we know the West's history.
Deflecting from one to the other is really low & despicable.
Commonly, third worlder refers to a brown person.
Western culture isn't some supreme standard we all aspire to.
WEIRD (Western European Industrialized Rich Democratic) people are not the objective, universal standard for humanity.
Such beliefs are one of the key enablers of racism.