That's not the Kessler syndrome [1]. You're describing orbital debris incompletely burning up in the atmosphere. Kessler syndrome would be caused by the opposite: debris staying in orbit.
Also, the Kessler syndrome isn't real. Space is big. The volume contained between any two orbits are massively larger than the surface of the Earth. Kessler effects, i.e. orbital debris impacting other satellites, thereby creating more debris, are real. But they stop escalating pretty quickly, and in no case deny orbital access.