Soldier stationed at base in Louisiana allegedly said on messaging platform that he wanted to ‘kill these motherf—kers in order to make sure the white youth is f—king secured’ JTA — A soldier stationed at Fort Polk in Louisiana was arrested last week after he told users on the popular messaging platform Discord that he planned to conduct a mass shooting at a synagogue. Jakob Marcoulier, 22, was arrested last Thursday and charged with transmitting a threat in interstate commerce after the FBI’s National Threat Operations Center received a tip in February that he had made threats toward synagogues, according to the US attorney’s office for the western district of Louisiana.…