some people do not know the circumstances surrounding the reason of the dog being in the car. I left my dogs in the car one time for LITERALLY 5 mins with water and the windows cracked to run into the food store with my 2 nieces and in that 5 mins I had a note on my windshield saying "nice way to kill your dogs a$$h0le" and my niece read it!

It was 70 degrees out, not 90 and they had water and the windows cracked and it was 5 mins! I wish the person stuck around to see how long I was gone... they would have never left a note. I'd NEVER put my boys in danger! ggeezzz
Anyways, Use your judgement, only you know what you feel safe in doing and they are your dogs. Clearly you care about your babies and would never put them in danger... so really the woman's opinion of what you did does not matter.
I think you know what you are doing with your babies.