Underlining Russia’s widening isolation on the world stage, Prime Minister Narendra Modi of India told President Vladimir V. Putin on Friday that it is no time for war — even as the Russian president threatened to escalate the brutality of his campaign in Ukraine. The televised critique by Mr. Modi at a regional summit in Uzbekistan came just a day after Mr. Putin acknowledged that Xi Jinping, China’s leader, had “questions and concerns” about the war. Taken together, the distancing from Mr. Putin by the heads of the world’s two most populous countries — both of which have been pivotal...