Can vigorous rubbing 1 month after hair transplant affect grafts?

You should not have had that type of aggressive rubbing with  alcohol. You may have had a reaction to the alcohol. Hopefully you will be ok and not have damage. Time will tell and keep in contact with your contact with your hair surgeon.

Grafts are stabilized and firmly implanted by 1 week post op hair transplant. After 1 month massaging and rubbing the scalp won’t dislodge the grafts

Thank you for your question. At one month, your grafts have likely taken hold. I would suggest that you review your grafts and results with your medical team and board certified facial plastic surgeon.
Best wishes,

Though you always want to be gentle with the scalp, luckily after one month the transplanted grafts are pretty safe and sound under the skin. It's a bit unusual though to have redness in the recipient area one month after surgery. I would discuss this with your surgeon and make sure the scalp looks healthy. 

Rubbing the scalp post op is not recommended. Its unlikely that the rubbing caused grafts to disloge.

vigorous rubbing 1 months after a hair transplant is never a good idea. If the scalp is red, then you need to have your doctor look at it to make sure that you don't have an infection