You have it backwards. Computers, software engineering, networking, cryptography, wireless digital comms, and so on, were made for war. It so happens they turned out to have some good peacetime applications too.
I find this news to be incredibly ironic.
And I disagree with the demands, just in my personal opinion.
We have real, powerful enemies that would love to dethrone US as the dominant nation. Those who demand this restriction for working on military contracts have to seriously consider this.
If private sector workers can regularly get their private sector companies to pull out of US military contracts, we have a problem.