WASHINGTON — One morning last month, several hundred Muslims living in the sugar-cane belt east of New Delhi awoke to discover fliers plastered to walls in their village, ordering them to pack up and leave with their families by the end of the year — or else.

“If you do not do this,” the unsigned posters warned, “then what TRUMP is doing in America, the same things will happen in this village.”

It was a stark illustration of how Donald J. Trump’s presidency has reverberated around the world over the last 100 days — becoming a rallying cry for some and a source of fear for others, upending long-held assumptions and roiling the politics of countries as far-flung as India, Mexico and Australia.

Mr. Trump’s most predictable quality is perhaps his unpredictability. So it makes sense that his impact would be felt differently in different parts of the world, resonating with, or repelling, people in countries that have idolized, demonized or relied on the United States.