Complex sentence: Many French people, including "Les Marseillais", dislike Paris because of its dominant political, cultural and economic influence, and by extension, tend to dislike its chief football team, Paris Saint-Germain, mainly supported by Paris born people.
Split into simpler sentences: Many French people, including "Les Marseillais", dislike Paris due to its dominant political, cultural and economic influence. By extension, they tend to dislike its chief football team, Paris Saint-Germain, mainly supported by Paris born people.