Please help my 2008 mazda 3 is stalling and idling rough at stoplights.

What is your question?

We had to unhook battery for something and now car stalls when I have to slow or stop at lights. Runs low idle n dies. We tried the run car for 20 minutes in park then turn on air conditioning for 15 minutes. Stalls probably worse now. Does it matter that my air conditioning compressor does not work? Did we do something wrong? Please help. I use this car to drive my son back and forth everyday to a different town for school. I'm worried I'm gonna get hit when my car stalls in an intersection.

What makes this problem better or worse?

Slowing to crawl makes car run rough and stall

How long has your 2008 Mazda 3 had this problem?

Few weeks