Complex sentence: In New York, Weiser became a leader in the Palatine community and when the Germans were in dispute with their English landlords and the government of New York, he was among the representatives who went to London to seek help from the British government.
Split into simpler sentences: In New York, Weiser became a leader in the Palatine community. When the Germans were in dispute with English landlords, he was among the representatives who went to London to seek help from the British government.