It is most certainly is a religion. As with all religions throughout history there are those among that religion who have warped and bastardized it to be something it was never intended to be. The same as been done with Christianity throughout history at different points in time. Millions of people throughout history have been killed and slaughtered in the name of Christianity as well.
You call it "taken over the religion". At this time there are just over two billion Muslims in the world. There is a difference in taking over the headlines and taking over the religion. What makes the news and what gets shown to many are just the extremes of the Muslim religion, not the religion as a whole. You know how that works. Only the most extreme things hit the news. It makes for ratings.
I don't see the peaceful ones speaking out against the radicals
I get that. We never see what we haven't been shown or haven't looked for ourselves. There are a lot of peaceful Muslims leaders who have spoken out and this is by no means a compete list. It doesn't even account for the peaceful Muslims around the globe that speak out against it................
• Muhammad Tahir-ul-Qadri: The Pakistani-Canadian Islamic scholar issued a comprehensive 600-page Fatwa on Terrorism in 2010—endorsed by Cairo's Al-Azhar University—declaring that suicide bombings and terrorist attacks have no place in Islamic law and branding terrorists as unbelievers (disbelievers of peace).
• Grand Mufti Ibrahim Abu Mohamed: The Grand Mufti of Australia has repeatedly issued public statements and fatwas condemning violent extremist acts, including the 2014 Sydney hostage crisis and subsequent acts of terror, emphasizing that such violence contradicts Islamic teachings of peace.
• Dr. Zafarul-Islam Khan: The prominent Indian Muslim scholar and former head of the Delhi Minorities Commission has publicly condemned mass atrocities and acts of terror committed by militant groups like the Pakistani Taliban, calling them "a blot in the face of Islam".
• Imam Azam Akram: Local and international community imams (such as Imam Akram in Chicago and various leaders organized through groups like the Islamic Network Group) regularly hold interfaith forums, lectures, and condemnations explicitly rejecting ISIS, Al-Qaeda, and domestic radicalization.
• Hassan Rouhani: As president of Iran, Hassan Rouhani condemned international extremist massacres—such as the 2015 Paris attacks claimed by ISIS—publicly labeling them "crimes against humanity".
• Jama Masjid Trust (Delhi): The leadership of India’s historic Jama Masjid explicitly refused Islamic burial rites to the perpetrators of the 2008 Mumbai attacks, stating that those who commit such heinous acts against innocent people cannot be considered true followers of Islam.
The issue as it seems to me is reporting things like this doesn't help feed into the agenda that you seem to be convinced of.
A fraction of all Muslims are actually violent extremists. Convincing people to believe otherwise seems to be the ultimate goal.