Why was democracy more welcomed by nationalists than monarchy? (Period 1750-1900)

(See explanation for further details)

Explanation:

As monarchy was seen as a form of government where people were subject to the rule of monarch and their families, in which people only have rights as privileges granted by the monarch. Whereas democracy represented a form where citizens of the same nation have the same rights and duties, and would make them active figures of the construction of nations.