Andreessen's anger is entirely misplaced and should be directed at the NSA. They are the ones that are intercepting American technology products, like Cisco routers, and modifying them before shipping them overseas. All without (as far as we know) the knowledge or consent of the companies that make the products.
All American technology products are now suspect, in ways they never have been perceived in the past. Not because of the NSA spying on foreign countries, or collecting domestic meta data. But because the NSA is now tampering with American technology products and companies.
The tarnishing of American business has nothing to do with Snowden.