Edited to add: I have a question here. Why are people so intent on proving Einstein wrong?
The over promotion of Einstein as a genius has prompted a great over reaction. Note that I am speaking as a great fan of all the pioneers in the 'New Physics'. I think I understand some of it. I have argued against the anti relativist cranks intensely over a long time. However, I think I understand some of the emotional dynamics of this retain.
Einstein has been over promoted as the greatest genius of all time. When I was young, many nonscientists in book and article presented relativity as the greatest intellectual achievement of all time. These probably didn't understand it themselves, but this is how they presented it. He was associated with the invention of 'atomic energy', which was and is a very important topic at the time.
The formula E=mc^2 was said to have been the major key to unlocking nuclear power. Also, Einstein was credited with having invented that formula for the first time. Neither claim is precisely true, though there is a small truth embedded in the claims (very small). His letter to Roosevelt was said to have convinced the President to push the nuclear bomb project. Ironically, this letter was more political than scientific so it didn't really show genius. However, nonscientists conflated the letter with the formula 'E=mc^2', which was in turn conflated with the entire nuclear bomb project.
So the partial truth in the antiEinstein claims was that Einstein was over promoted as a genius. Strangely, Einstein was also 'over promoted' as being illiterate. Einstein was not a polymath. he did poorly in some subjects. He had to work on some subjects in school to get through. So there was also a legend that he was dyslexic. Stories abounded about all the things he had difficulty in. He had difficulty in foreign languages (who doesn't?).
Einstein was a late bloomer in mathematics, sort of like Beethoven in music. So in the same sense you could say Beethoven wasn't a musical genius, you could say that Einstein wasn't a mathematics genius. After all, all geniuses have to bloom early. Right ?-)
Which brings us to antiJudiasm, which is a major contributing factor. One of the reasons Einstein was over promoted was because the Jewish community overprinted him. Much of it was defensive. They had been persecuted over the decade of WWII because they were genetically inferior. They were killed largely due to the myth they were genetically incapable of constructive thinking. They can only promote lies, according to Hitler! So Einstein was promoted as a case of the exact opposite. He supposedly shows how Jews were superior to other people in creative enterprises, especially Germans.
The irony is that Einstein was also German. Many of the geniuses who started the 'New Physics' were German. In fact, some people in England were initially skeptical of Einstein because he was German! There were big antiGerman feeling in England and America. Einstein faced prejudice against Germans! So scientists in these countries were inclined to do more experiments to prove those pointy haired Germans wrong. To the credit of English and American scientists, those experiments ended up proving Einstein right.
People who are defensive about their lack of mathematics activity like to compare themselves to Einstein. After all, they have uncontrollable impulse that they can't follow up on. They can write down formulas at the drop of a hat, right? No one gives them credit for rambling on and on. Many of them are real dyslexics.
Many of these dyslexics are also anti Jewish. Racism is almost universally a grass roots movement. They emphasize the virtues of the 'common man'. The common man in their view tends to be a semiliterate. So anti Jewish racists who are also scientifically and historically deficient tend to attack Einstein, the icon of Jewish genius. Of course, Jewish illiterates do much the same thing. However, they don't know relativity or any science either. So they don't defend Einstein all that well. The nonJewish illiterates have an unfair advantage !-)
Although not all 'anti relativists' are antiJewish, there are a great number who are. Many of the emotional antiEinstein cranks are antiJewish. They are very loud and obnoxious.
Of course, there are legitimate scientists working on experiments to falsify relativity. I met some Chinese scientists at a university about ten years ago attempting some incredibly-precise optical-experiment to show that space is not truly anisotropic. They had miles of fiber optic cable in a room that was specially designed to be vibrationally isolated. I haven't heard about them since. I guess it didn't pan out, but I am not sure. I seriously doubt there was any prejudice associated with their work. Personally, I hope to hear about them one way or another. However, their effort is know right now to a very few. Hurray for China, which funded them!
<Note that I don't support China in all her endeavors. However, I appreciate truly innovative research. So let me applause them on this, at least!>
Which brings me back to Beethoven.
Bethoven was a musical moron! All those rumors that I am tone deaf are lies lies by the Beethoven cult! I have musical genius that no one recognizes even though I can't hold a note! I can bang out four notes repeated again and again! I used to sing as a child in a choir! I bet Beethoven never did that! And Beethoven had this wild hair! I don't have wild hair! And Beethoven was German! The Germans are always promoting their 'hero', Beethoven! The Germans are always trying to take credit from the Jews! This is why they can't recognize a real musical genius like Barbara Streisand !-)