Gosh but I love these kinds of discussions.
The "We" thing is superfluous.
It is "They" that matter.
"They" will build them...."They" will give them to Terrorists. Then They will use them against Civilian Airliners.
What "We" do re building the things has f@ck all to do with what "They" do.
If one believes those who wish to lead us to believe Tens of Thousands of the things went missing as a result of the West's tumbling of Qadaffi....then perhaps that should be the focus of the OP's concerns and not the MANPAD's we build, store, safeguard and control.
It is those we don't store, safeguard, and control that are the threat.