I have a daughter who was dxed at age 2 so I understand your frustration.

Your child does not have autism. He is angry about shots and blood tests that he doesn't understand.

Try to get a teddy bear that also needs blood tests and insulin.Let him treat the bear.[ use water for insulin.]

One trick that worked for me was to put one gummy bear [ 0 carbs for one ] right on the machine.He gets the candy when he doesn't fuss or the bear goes back in the bag.After a while he will forget about it but this can be helpful in the beginning.

Check out support groups for parents and programs for kids with diabetes.

At a parent support group I used to attend, our conversations often turned to " How do we get blood off the wall ?"

Once a kid runs after the finger prick, they have blood to paint with .I remember those days well.

Another good idea is to tell him about 3 minutes before a test or insulin.That way he is prepared and you don't just grab him and scare him.He can help you cook or set the table. Then he has a vested interest in eating.He can stir a salad, put ingredients into a bowl or put spoons on the table.

Good luck and best wishes.