I have no problem with females serving in the combat roles, if a minimum physical task standard is published and enforced equally between males and females.
I give you my perspective. When I went to Air Assault School, there were some females in my class. Some of them could run 2 miles faster than me, do more push ups, do more sit ups. However, none of them beat me on the 12 mile ruck march. The only reason I mention this to emphasize the stamina portion of the physical standard. Being a combat soldier, especailly infantry type, is not a 100 yard dash then rest, it's a marathon.