Why did the bomber go to the Black Caucus Building, kneel down, but no bomb found there?
Whoever was giving him orders may have changed their mind at the last minute as to where to plant the bombs.
If the op was to frame MAGA, then maybe initially it was thought to plant the bombs at the Black Caucus office and the DNC but at the last minute decided planting it at the RNC instead of the Black Caucus could be effective in driving a wedge between MAGA and the GOPe and pushing the GOPe towards the Biden Dems to make a combined front against MAGA.