I hope Hashem would have mercy on Humanity and forbid any disaster. But I agree that there is a correlation with this experiment and 9/11. 9/11 just happened because apikorsim prefered their own death to respecting Jews. Had they respected Israel and renuonced hate, recognised Jerusalem and Torah, no Islamic lunatic would have had they minimum suppoort as to create al-Qaeda. The West had already experienced that terrorist orgs. grow when haters are given hope, but they prefered to continue with their evil paths.
And now, they are doing the same, they base their argument that the collider is safe on the idea that Earth is 5.000.000.000 years old, and so, those collisons have taken place one million times naturally, and nothing happened. But Torah says Earth is only 5768 years old, and so statistics would show that these collisions would have occurred naturally only once, or never. And even if we consider Bereshit to be symbolic, wouldn't it be possible that Hashem is preventing this phenomenum in Nature everyday? These scientists are not religious. They have completely disregarded the Divine intervention and attempt to explain everything by reason, excluding G-od, even if they may believe in Him (they deny His control of the Universe).
And attempting to know the orgins of the world is not sience. It's rebellion and vanity. Why wanting to know that secret? Just to have it in mind for some decades? Don't those experts remember that, even if nothing goes wrong, they will die as any human being, and their knowledge will die with them?