Brazil is on the list just because Brazilian justice condemned Bolsonaro for a coup attempt very similar to Jan 6 (it was Jan 8 the following year). The beef has been going for a while, and Lula has been quite combative against Trump.
Maybe because the intended target are immigrants who purportedly put a higher load on welfare and public services:
> "The Trump administration is bringing an end to the abuse of America's immigration system by those who would extract wealth from the American people," State Department spokesman Tommy Pigott said. "Immigrant visa processing from these 75 countries will be paused while the State Department reassesses immigration processing procedures to prevent the entry of foreign nationals who would take welfare and public benefits," he said.
Since the Indian diaspora is famously known to be the wealthiest on average in the US, they wouldn't be targeted under such reasoning.
The list includes Russia, Iran, lots of RU-aligned nations, and a bunch that probably have security issues.
The only one that stood out as odd was Thailand.