EMMA BATHA THE world is becoming less tolerant of migrants, according to a poll released on Wednesday as Europe prepared to unveil a new asylum plan in the wake of a blaze at an overcrowded camp in Greece that left thousands without shelter. Seven European countries, led by North Macedonia, Hungary, Serbia and Croatia, topped the Gallup index of the world's least-accepting countries. But the sharpest changes in attitudes were in Peru, Ecuador and Colombia, which have seen an influx of Venezuelans fleeing turmoil at home. Canada was the most welcoming country toward migrants, followed by Iceland and New Zealand,…