Jewish people are about 2% of Americans or two out of every hundred Americans. So about 20% of 2% -or- four people out of a thousand are Jewish Americans who vote Republican.
So a lot more than just 13 in all of the USA, but really, only 16 out of four thousand people.
Polling 16 people out of four thousand and claiming that their opinion is somehow relevant when compared to the 3,984 other people is just silly.
On the other hand - so is the usual ‘blame’ assigned to Jewish people for voting Democrat. Great - 80% of 2% of the population is really swaying things towards the Democrats! Not even close to being decisive.
Actually 1.6% of voters is fairly decisive in a lot of elections. That’s .6% more than if they were a representative 50/50 split, so on average the Jewish vote ‘gives’ more than a half percent to the Democrat candidate.