Why do people believe the twin towers went down not because of the planes?

Ive heard because the steel could not get hott enough to break as it did without the help of dynamite but the builders proved that wrong, and also the people that constructed the building put together a slideshow of why theres those "poofs" in the sides of the buildings blowing out and saying it was because the levels were breaking and they showed the exact material that was in those corners and did a demonstration of it happening on another building the same way. Just confused why people are needing to blame our government. Gas prices and Oil is higher than ever again? Were will our government strike now? Its the best time since Bin laden died and they can blame it on Al qaeda. Hey u can even blame it on Obama this time and not bush!! Lol moron democrats