Unless there is some deficiency about Martin ukes from Mexico that has escaped the "Holy Requirements Committee", I'd think that this Konter uke would still be just fine to anyone who has played it.
I have played a whole bunch of the CK-1 and TK-1 ukes of friends at uke jams, and all of these were made in Mexico, and all were fine examples of a Martin uke.
I think maybe the $2,500 price tag is causing lots of resentment and some folks might just be adding to the churn for it's own sake. This is also a form of trolling.
If it's not in your budget, that's just fine, and there are thousands of cheaper alternatives.
Similarly, if the historical significance of the instrument does not appeal to you, again, there are thousands of alternate choices.
If someone were to rain on this parade, it might be prudent to have a good look in the mirror instead.
The rest of us can enjoy the fact that Martin is a part of ukulele history, and continues to share that history with us in new products, some of which are a tribute to interesting things that happened before some of us were even born.