There's never a need for ad hominem attacks, though I can understand why people are seeing red from reading his views.
Even if he were 100% right though (which is not the case) he should still be careful of espousing those views:
1. Timing is inappropriate. Regardless of historical rights and wrongs there are good, harmless, innocent people being attacked and living in fear of being attacked. It is not the time to be making a case that they're wrong or even hint that they earned what they're getting.
2. Be careful of the company you keep. Those views align with the most vicious and rabid anti-semites, and they are used to justify cold blooded murder. I can't imagine why any yid would want to give the impression of endorsing those excuses.
(Let's not forget that when the jews in Jersey City were attacked the same type of arguments were used by city officials to remove sympathy and give justification)