VOICED : Brasil prometen mas protestas

In Brazil, thousands protested against the 2014 World Cup's high costs, marking the largest demonstration in two decades. Despite police efforts to disperse them, the public stood firm. The protests, which were mostly peaceful, turned violent in some areas, notably in Rio de Janeiro. The government was caught off guard by the scale and intensity of the protests, which involved over 250,000 people across multiple cities. As the Confederations Cup unfolds, more protests are anticipated, serving as a precursor to the upcoming World Cup.

What was the general sentiment of the protests according to the text?

What future events are mentioned in relation to the protests?