Full Disclosure: my friend works in the WH and interacts with President Trump on a regular basis.
The fact is President Trump is the most pro Jewish and Israel president in the history of the US.
His family is Jewish, he is surrounded by Jews. And his policies reflect that.
He has condemned white supremacy, KKK, Neo Nazi's and white supremacists like David Duke dozens of times.
OTOH your candidate refuses to condemn BLM which is an anti semitic and neo marxists group, and Antifa a fascist group which have been terrorising this country for years at this point, have caused billions of dollars in property damage, and have killed many people.
This is a binary choice!
Might be going out on a limb, but your friend who works in the WH may be a little biased toward Trump.
When a candidate is absurdly popular among white supremacists, refuses to condemn white supremacists at a key moment in the campaign, and says "stand by" to white supremacists, having a Jewish family is of little comfort to me.
The Biden stuff is simply wrong. He condemns the violence and rioting all the time. To the extent he supports the BLM movement, he supports only the non-violent aspects of the movement (and certainly not any parts of the movement that deal in anti-semitism). And re: antifa:
https://www.washingtonpost.com/outlook/five-myths/five-myths-about-antifa/2020/09/11/527071ac-f37b-11ea-bc45-e5d48ab44b9f_story.html.
It's incredible to me that we both think this choice is binary in opposite directions. But history has shown that the deadliest anti-semitic movements arise from the far right, not the far left. And to the extent that anti-semitism does arise from the far left, you don't have to worry much, because Biden is not a far left candidate. He has repeatedly distanced himself from far left policies throughout the campaign, including during last night's debate (see: green new deal, condemning violence/rioting, etc). Far left anti-semites hate Biden. Far-right anti-semites love trump. And Trump warms up to them more and more as the campaign goes on.