I (obviously) can't know what was in the minds of the folks who broke into the Capitol.
However, multiple news reports detail that a number of the folks arrested were carrying police-restraint style cable ties, firearms and explosives.
Given that both the Vice-president and the Speaker of the House (#2 and #3 in line of succession to the presidency), as well as both houses of Congress were in the Capitol at that moment, it's fair to ask who those folks intended to restrain with those cable ties?
And once they were restrained, what would they do with those restrained people?
Again, I can't say what was in the minds of the folks who attempted to occupy the US Capitol building, but some certainly brought weapons and tools indicating that they wanted to take hostages and possibly harm/kill them.
Do you usually bring molotov cocktails and police-style plastic restraints when you go sightseeing? Out to dinner, maybe? Or even to a protest rally?
While the protestors didn't storm the Capitol or bring tools to restrain people and destroy property, some segment of the rioters/insurrectionists did so.
As I mentioned, taking hostage and murdering the Vice President, the Speaker of the House and perhaps many members of Congress probably wouldn't have destroyed our government, but it certainly could be considered a coup attempt and definitely would be insurrection.
Trump told them he won the election. He told them it was fraudulently stolen from them. He told them that this could be rectified by interfering in the proceedings. His intent was to take and retain power by remaining president through intimidating congress into refusing to count the electoral college votes. So yes - they were intending to take power. The fact it was based on a made up fantasy with no basis in reality does not alter the intent of either the rabble or Trump who incited them and painted that reality for them.
Or did you ignore the videos of them removing barriers, or Trump supporters yelling at people breaking glass to stop, or protestors getting selfies with the guards in the building and tapping them on the shoulder and thanking them for their service?
This is a good list as well https://www.reddit.com/r/Keep_Track/comments/ks56rh/trump_ri...
There was also one on Steve Bannon's War Room too this morning towards the end.
There are multiple ones if you just search of the Capitol police literally waving people in.
https://freespeechextremist.com/media/d5a1870d-1c9d-45a9-be2...
Oh my, surely an unbiased source. Why not inform us what Alex Jones is saying as well?
What other reason for the attack do you imagine there was?