This is not the typical way an Orthodox rabbi speaks today. Rabbi Riskin issues a clarification
There is also an official clarification issued by Rabbi Riskin in the comments section
I knew what this con man was about 20 years ago when I first met him. He was responsible then for ruining the life of one young man I am very close with - making life miserable for his parents. His mother went to the grave suffering an estrangement from her son for which Leib Tropper was responsible. His father suffers to this day from it. He took advantage of this young man's misfortune and conned him into doing something no decent man would ever do. And he made it seem like he was doing him a favor. This young man is now 20 years older and still suffering the consequences of it. Consequences that after 20 years have little chance of being reversed! I cannot get into details because confidences would be broken. But suffice it to say his only concern at that time was not to help this young man but to help himself by gaining the support of a wealthy friend in doing this con.
I have been involved with Kiruv for over three decades. Close to thirty years ago a university student underwent a Giyur Kehalacha when he discovered that his mother was converted by Conservative rabbis. A week later he went to Yeshivas Ohr Sameach. A few weeks ago EJF told him that his Giyur may not be good because they have questions of the Rabbonim who did it. Who is a erliche Orthodox Rav and does not do kulahs in Giyur. This shocking action is beyond belief. The EJF did not call the Rabbomin in question. They just put the Safek in the mind of this person 3 decades later. We need a proper structure in Giyur, and proper standards kept. However the idea that Rabbonim in Monsey, or Meah Shearim will suddenly begin to question Geirus done properly is outrageous. There is no historical precedent for this. There are a small group of Rabbonim aligned with EJF that have attempted to impose their view on Gierus. They are overreaching and creating havoc in the Jewish community.
I went to Rav Reuven Feinstein when the now infamous former head of the EJF tried to stop my marriage to my wife who is a giyores. He claimed that the Rov who was migayer her did not know what he was doing. Rbe Reuven told me that her geirus was fine. We are married now. The head of EJF got what he deserved for the pain he caused me and many others.
I converted years ago and have been frum from the time I emerged from the mikvah and the EJF told me my conversion was invalid because of the rabbonim on the beis din, all of whom were frum Orthodox rabbonim by the way. I was not the only person this happened to. Of course the EJF offered to 'fix' it for a substantial sum of money. How nice of them.
Also involved in the campaign against my books was Yaakov Kalmanowitz's brother,Rabbi Osher Kalmanowitz of the Mir Yeshivah in New York. He did not want to openly involve himself, and so he recruited his friend Rabbi Leib Tropper of Yeshivas Kol Yaakov in Monsey. Rabbi Tropper created a story that was told to the Rabbis who were approached to condemn the books. The story involved two students in his yeshivah, described as "angelic," who allegedly dropped out of yeshivah and left Orthodoxy after reading my books and concluding that "if the Sages could have been wrong about science, then they could have been wrong about everything." Rabbi Elya Wachtfogel, the primary rabbinic authority behind this ban, presented this story as grounds for his campaign. I myself was shaken when I heard about this story, but my mentors were skeptical and advised my to investigate it. The investigation showed that one of them was barely observant to begin with, and dropped out of yeshivah before my book on the Sages' knowledge of science was published. The other left Kol Yaakov and went to YU; he wrote to me that it was nothing to do with my books, which strengthened his Judaism, but he noted that the rabbis in Kol Yaakov did not like them.
The fact that this story with the accompanying accusations has been printed in newspapers around the world, the normal thing would be to hire the best lawyer in the world and issue a public denial and sue all the papers for libel. The mere fact that this has not been done is the biggest proof the accusations are true. It is an example of what our Sages say that silence in the face of an accusation is understood to be an admission "Shetikah k'hodah".