How did liberalism and nationalism present a challenge to the conservative domination of europe in the early 1800's?

For starters, people started developing a sense of national pride which meant they wanted self governance and were getting sick of foreign powers ruling their land form thousands of miles away. Liberalism on the other hand came in the form of they wanting their basic rights and constitutions. They were sick of monarchs who wage petty wars and wanted republics and parliaments.