What if Huawei was a US based company, and had allowed government to access backdoor to mobile networks globally, would US react the same? Alternately you can

What if Huawei was a US based company, and had allowed government to access backdoor to mobile networks globally, would US react the same? Alternately you can replace US with EU and Huawei with NSA/FBI and think of the scenario and reaction/ I think, It should be a norm to opensource the equipment firmware Source and update mechanism so that they can be audited for the better of all. So even NSA/FBI/CHINA/ETC have hard time making backdoor.