can someone refer me some good sources of the rise of Islamic extremists?

It’s not the best source, but I’m currently reading ‘I am Malala’ Malala’s autobiography and she, as a Pakistani whose family lived through the rise of Islamic extremism, explains how the US and Gulf monarchies funded Islamic radicalization programs and the mujahadeen to fight the Soviets in Afghanistan, and that really laid the groundwork for future far right groups like the Taliban. She’s a Marxist, and though I don’t know if she says that explicitly in the book it also shows her radicalization experience well.

It might not be quite what you're looking for, but you might try Arun Kundnani, The Muslims are Coming! Islamaphobia, Extremism, and the Domestic War on Terror. It could be kinda the opposite of what you're looking for as the premise is that Islamic extremism isn't the problem is made out to be. It can be a problem, sure. But it's the state's response that is the bigger problem. And the scare stories are intended to justify this response. I've only skimmed this one so far. But from the blurb:

… Based on several years of research and reportage … this is the first comprehensive critique of counter-radicalization strategies. The new policy and policing campaigns have been backed by an industry of freshly minted experts and liberal commentators. The Muslims are Coming! looks at the way these debates have been transformed by the embrace of a narrowly configured and ill-conceived antiextremism.

The last chapter of this book talks about how the West and the Saudi monarchy funded extremists.

The documentary "Bitter Lake", which you can find on YouTube, maybe? I haven't seen it in a long time myself so I apologise if it's not quite what you're looking for.

Thank you all for your responses!!