Many of you have seen my tool-haul posts over the past year or two. I've bought LOTS of used premium quality tools, including USA-made Petersen brand Vise Grips. They are still plentiful out there, if you're willing to look for them. Moreover, you can often buy a used pair in excellent condition, for less than you can buy a new pair of the "global components" grips. I like those old Petersen-made Vise Grips, and so that is what I buy.
If you prefer USA-made Vise Grips, then just buy them used. If you don't go to used-tool events, just post a Garage Journal classified ad stating "WTB US-made Vise Grips", and plenty of GJ members can help you.
On the other hand, if you wish to buy brand new Irwin brand Vise Grips; they are available in many stores, hanging on the rack brand new. Go for it.
No need to attack each other's different opinions about this. We won't change world markets, or each other's ideas. In the end, we're all going to buy what we prefer anyway. So just do it, and enjoy.