Do you find it difficult to do business with jewish people?

Someone's religion does not come up in discussions with people with whom I am doing business. I only know if that person happens to be a friend or we have been talking about religion.

I also know if I am going into a shop that I know is owned by someone Jewish.

The few times I have known that I am doing business with someone Jewish they have been no more or less difficult to do business with than non Jews.

I worked with a Jewish man for about four months and every month he would pay me (below minimum wage) for my assistance for the month.
He would then turn around and say "I need groceries" and not give me cash for those groceries.
That is the Jewish way of doing business. They pay you to spend money for themselves.
And so I don't offend anyone....only SOME Jewish people, not all. Okay, maybe most.

I have no real experience of "doing business" with jewish people but have met several and had no problem with them. If you mean because of cultural awkwardness then i suppose thats fair enough but if its due to some misguided trust issues then i feel sorry for people who do.

Not unless I was a pork products salesman.

It has nothing to do with whether they are jewish or not. If the person is difficult, then its the person who is difficult, not their religion.