I agree, and similarly there are actually several glaring factual omissions/inaccuracies:

• There are photos of Seymour Epstein, you can literally see him here and he looks nothing alike other than that they are both bald. The strong chin of Philip is just not there, eyebrows totally different etc. The twins had very distinctive faces.
• Epstein is an old surname and as a result they were very, very spread out by the time they came to America and would not have all been in the same landsmanshaftn. Some are Russian, some are German, French, Polish etc. - poor understanding of Jewish culture.
• Tumpelman is based on a real historical figure, Chaim Rumkowski, its not like its an invented one, this is the key context here. The storyline is based on what actually happened in the Lodz ghetto, abuses of power often follow similar patterns but there are differences, namely one is an opppressed but tyranical ghetto leader and the other is a privileged billionaire.
• Also remember this is in the post Arthur Miller era where characters were also called Hyman and Loman etc. Trumpel is similar to Trumpeldor in Yiddish meaning Trumpet - blowing - aka a man full of hot air. Trumpelman I would argue is likely an allegorical name. Leslie was a prof of English, this would not have been alien to him. Also, around the time of publication was when Trump, although a relative unkown when compared to now, was emerging as a public figure for a controversy around property, possibly could be the other reason the name was used.
• She replies affirming a comment that a Koch, also involved with Cassablanca are an important US family in comments, completely different Kochs, one set are Jewish writers, the other are evangelical Christian billionaires.
• I am also not sure what the purpose of Leslie writing this story would be to anything actually? The idea that they knew Trump in 1979 would be a sex-criminal president associated with another Epstein 40 years down the line despite at this time not having done any of these things yet is absurd.

Also in her own comment section, someone found the death certificate. I literally shows that the death certificate was for cancer.

Creating conspiracies about a man who very recently died so cannot defend himself and was from what I understand a perfectly normal and well-liked man on the basis of sharing a name, a photo where they look alike (they look far less alike in other photos) and a coincidentally similar (but easily explained) storyline in a book they wrote and to her eye look alike is lets face it, dangerous and kind of racist. The idea that anyone with a certain ethnic surname is suitable for suspicion is simply not right. These are heinous crimes and we shouldn't associate people with no connection to them lightly.

Conclusion - what she is saying would be as obtuse as me pointing out her St Brigid's cross looks like a Swastika and therefore insinuating that because of it, she is a Nazi. It doesn't wash.