The majority of congress were resolute in completing one of the...

The majority of congress were resolute in completing one of the biggest frauds in US political history
hence the protests

No fraud would have meant no protests. Most of these protesters were exercising their 1st amendment rights - the cops allowing the protesters into the Capitol and a few of the nutcase protesters were just complicit with the fraud. As numbers mentioned - it was a real Reichstag moment

First Amendment

The First Amendment guarantees freedoms concerning religion, expression, assembly, and the right to petition. It forbids Congress from both promoting one religion over others and also restricting an individual’s religious practices. It guarantees freedom of expression by prohibiting Congress from restricting the press or the rights of individuals to speak freely. It also guarantees the right of citizens to assemble peaceably and to petition their government.