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Where were they two decades ago? Oh yeah, passing the Patriot Act to trample on our rights and authorizing the Iraq War to kill hundreds of thousands abroad. Now they uphold Bush as a shining example of a good republican. Honestly, with all the shit the US has been doing to the world over the decades, maybe it eating itself is not actually a crisis.
AOC, The Squad, and Bernie are all still a tiny minority in the party and when they speak up in any significant way, they get punished for it: https://apnews.com/article/congress-house-censure-resolution-tlaib-8085189047a4c40f2d44ada4604aa076
Sure, Bernie can repeatedly talk about going after the oligarchs/the 1%, striving for free healthcare, and so on, but democrats know that he is not going to achieve his goals. Tlaib, in speaking about israel, was speaking on an issue where more direct action could easily be taken and so “centrists” felt threatened. Similarly, Bernie received the most opposition from the democratic party when he ran in the 2016 and 2020 primaries.
If progressives start gaining more power, they will get stomped down, as we could see by democrats making efforts to get rid of them or prevent them from winning in primaries: https://www.cnn.com/2022/05/15/politics/progressive-democratic-house-candidates-primaries/index.html
Of course democrats are better than republicans (an extremely low bar to clear), but they’re not the huge battleship you frame them as. They do not fight for us unless it’s on issues that do not threaten the interests of the ultrawealthy. This is why they will endlessly talk about reproductive and LGBT rights, but even then democrats will still let those rights stay in a precarious position so that they can keep using them as talking points. For example: https://www.nytimes.com/2009/05/15/us/politics/15abortion.html