I disagree with trump supporters' points at allcompletely, but protesting is everybody’s right because in America, everyone has free speech freedom.

The phrase "at all" did not make sense here, if you wanted to use "at all" you could say "I do not agree with trump supporters' points at all." "Speech freedom" needed to be flipped around

The parliament Houses are where thCapitol is where lawmakers work, and it’s also an important building in America.

The second part of the sentence implied that you're taking about a single thing, while the first implied that you're talking about several buildings. I chose to make it singular and write "the Capitol," because that's where things took place.

Additionally, in the American context, we don't really say "parliament." "Congress" would be best. If you want to emphasize the specific buildings, you could also say something like "the Capitol" or "Congressional office buildings."

To protest human rights, the lawmaker’s effort is necessary.

This is a bit unclear to me. Did you perhaps mean to type "to protect human rights"?

To protest outside the parliament HouseCongress is acceptable.

I dison't agree with tTrump supporters' pointviews at all, but protesting is everybody’s right because in America, everyone has speech freedom of speech.

"Points" suggests that you are looking at a specific argument.

As to entering the parliament HouseCongress to commit sabotage, it's really too much.