There are many jews who are very smart. They would have never accomplished all that they have done if they all were stupid. So there are jews who have actually made advancements and discoveries in science in things like math or physics.
It is also extremely common that humans have worked and discovered great things, only to be ignored and mostly forgotten by history and for their discoveries to falsely be related to jews who only copied them later. Einstein is one of the biggest frauds and plagiarists in history. His entire document about Relativity is not written like a scientific or academic document, it does not contain even one single citation about anything, and it is written more like the style of a children's story book. And he gets all of the credit for relativity? He literally stole and plagiarized everything from the work of dozens of scientists who actually are the ones who discovered and described these things. Dozens of French, Swiss, and German scientists. For the most basic quick example, the actual equations that are used to make conversions of Relativity are the Lorentz equations discovered by Lorentz many years before Einstein ever wrote anything. How can you be the "discoverer" of a concept when the concept not only is already known, but is already mapped out with specific equations?
A website talking about this and giving all of the evidence, proof, and examples of the dozens of scientists who actually discovered these things is called something like Einstein The Incorrigible Plagiarist.