no
yes, diabetics can have tomatos.
It depends, but most of the Chinese food is actually quite healthy. Like any other food, you shouldn't eat to much of it though.
No
Unripe plantain is good for diabetics but unripe ones are bad because of the sucrose(sugar).
yes
yes
you should not eat fish, which has too much fat, and you should not eat veggies which are bad for blood sugar.
Your question must say what "they" are, before it can be answered.
no, they can eat it and feel fine.
Go for brown rice.
yes
Kashrut, the Jewish dietary laws, govern the preparation and consumption of food for Jew. There is no conflict between kashrut and preparing food for diabetics.