Let's change the phrasing of Ellison's statement a tad, shall we?

"This is happening within a certain context. I have to come to a conclusion, based on all of the behavior I've seen out of Keith Ellison, that the reason he is reluctant to denounce ISIS and Islamist extremists is because he is a Farrakhan acolyte, anti-Israel, and a rabid antisemite." 

Such notables as Haim Saban, a top Democratic donor, and attorney Alan Dershowitz have denounced Ellison as an antisemite and, in fact, Dershowitz threatened to leave the party if Ellison was elected DNC chair. So this is a rather hypocritical accusation by Ellison. Get the log out of your own eye before trying to get the speck out of your neighbor's eye--an old JEWISH proverb.