All religions are shit, some are more shit than others. Just depends on the degree to which they impede human progress by imposing arbitrary rules on their followers, offering a haven for abusers within their leadership structures and interfering with politics in general (but particularly where education policy is concerned). Negative value across the board.
Christianity is not inherently better than Islam, it just behaves better nowadays.
And the reason it behaves better is not something inherent to christianity, but because it got dragged, kicking and screaming, into the age of enlightenment and beaten up with education, democratisation and secularisation until it had to bend or break and it's adherents decided to bent.
Islam is still more radical because it faced less opposition to it's ideas from within. The islamic world needs it's own age of enlightenment where radical tensions between religion and an educated public reduce the influence of religion on that public.
And I don't think this has much to do with Islam being younger. Islamic natural philosophers are behind some of the most important discoveries in the sciences and the Islamic Golden Age ended around 200 years, before the Renaissance even started.
If the Islamic Golden Age had not declined, today Christianity might have been the more radical religion and we might have seen a mostly secularized islamic world. It is mostly through chance that history unfolded differently. And with Project 2025 in the US, we might still see a return to barbarism and departure from secular enlightenment in the most powerfull nation puppeteered by christian extremists.
“Many religions now come before us with ingratiating smirks and outspread hands, like an unctuous merchant in a bazaar. They offer consolation and solidarity and uplift, competing as they do in a marketplace. But we have a right to remember how barbarically they behaved when they were strong and were making an offer that people could not refuse.” - Christopher Hitchens
If you think Radical Islam is alone I'd like to introduce you to Ireland and India. Both countries proving that radicalism transcends race and culture.
Religion is not the enemy, church is the enemy. Church wants to be accepted as the only path to salvation. The enemy is church, or whatever name it is called.
If you don't think radical atheism isn't like radical Christianity and radical Islam, you haven't studied the history of the various communist countries of the world.
People who are absolutely certain they are right can do some fucked up shit.