You'll find a lot of people feel that way and will trash anyone trying to have rational discussions about Israel's government policies on their own merits.
Many of these same people have a Faith view that America must support Israel no matter what policies it undertakes, no matter that statements its elected leaders make.
I find that view antithetical to the fundamental idea there are moral absolutes, right and wrong, but that's some people's personal Faith position and they will savagely attack those who don't share their viewpoint.
For them Israel can do no wrong, is above any and all criticism and a bedrock opposition to using checkbook diplomacy anywhere is seen through a narrow prism as an attack on Israel and the Jewish people.
In a large way it reminds me of the use of the race card by the Left to destroy debate and demonize those with other viewpoints.
You make an excellent point. I totally agree.