DHAKA (Reuters) - Thousands of Muslims took to the streets of the Bangladesh capital on Tuesday to protest against remarks by French President Emmanuel Macron in a row about cartoons of the Prophet Mohammad.The dispute has its roots in a knife attack outside a French school on Oct. 16 in which a man of Chechen origin beheaded Samuel Paty, a teacher who had shown pupils the cartoons in a civics lesson on freedom of speech. France has allowed displays of the cartoons, which are considered blasphemous by Muslims. Macron paid tribute to Paty, describing him as a “quiet hero” dedicated to instilling the democratic values of the French Republic in his pupils. Protesters in Dhaka unfurled placards with caricatures of Macron and shouted slogans, demanding an unconditional apology and the ouster of the French ambassador. Many carried placards bearing messages such as “Stop Islamophobia”, “Boycott France” and “Lay siege to the French Embassy in Dhaka” as they marched towards the French embassy before police stopped them. “Muslims will not let this go in vain,” said Atiqur Rahman, a spokesman for the Islami Andolan Bangladesh, a rightwing group. “He (Macron) needs mental treatment. He has not only made himself the enemy of Islam, but of all peace-loving people too,” he said, while calling for a boycott of French products. France warned its citizens living or travelling in some Muslim-majority countries to take extra security precautions on Tuesday as anger surged over the cartoons.