In my opinion, he is completely disqualified from offering an opinion, never mind chastizing fellow Democrats and I'll tell you why.
With this lede, he is null and void on Israel and nothing he says should be taken seriously.
"As a liberal Democrat who twice campaigned for President
He should just shut up.
Imagine Israeli PM Netanyahu taking him seriously when he admits to such terrible judgement. not once, but TWICE voting for the most antisemitic and anti-Zionist President in American history.