外媒：荷兰爆发反移民抗议活动，警方与示威者发生激烈冲突，已有30人被捕

Core Points - A significant anti-immigration protest occurred in the Netherlands, leading to violent clashes between police and demonstrators [1][2] - The protest was organized by a right-wing activist and drew thousands of participants demanding stricter immigration policies and action against asylum seekers [1] - Police used tear gas and water cannons to disperse the crowd, resulting in 30 arrests and injuries to 2 officers [1] Group 1 - The protest involved demonstrators waving Dutch flags and those associated with far-right groups, with incidents of stone and bottle throwing [2] - A police vehicle was set on fire, and a highway was briefly blocked by protesters [2] - Protesters vandalized the headquarters of the Dutch 66 Democratic Party, prompting a strong response from the party leader on social media [4] Group 2 - A small group of protesters attempted to reach the Dutch Parliament building, which was barricaded due to ongoing renovations [4] - Authorities indicated that further arrests could occur as they review surveillance footage from the protest [1]