"No, I'm pointing out that Polk's Mexican war was by no means a universally popular one..."
Few are, as wars are, well, generally unpleasant, but again, if you're going to use this as a reason to attack Polk, you have to apply it to EVERY leader that's ever fought a war, and there go just about all the "greatest" leaders we've known in the West AND East, for that matter...
"and that many people spoke out against it..."
Again, yes, that tends to happen in war...many spoke out against fighting the Civil War, and jsut wanted to let the South go...does their opposition to the war suddenly make it unjust for that reason, and we should've jsut let the South go?
"and that there were alternatives to the course he took..."
AGAIN, in almost ANY circumstance you can say that, I have alternative words I can use right now, but I'm choosing THESE words, and the fact that I choose them doesn't automatically make the words I didn't use better via hindsight...it's the same argument over and over with you, "Could've done this, should've done this..." Coulda-woulda-shoulda is easy for you to emply in the luxury of a home brought about by conquest and blood and death when you have no leadership responsibilities at all...
"and that his decisions did much to unravel the Union."
You've NOT adressed my first point on this...
THE UNION WAS DOOMED TO FIGHT THE CIVIL WAR FROM THE SECOND THE FOUNDERS DIDN'T ADRESS SLAVERY IN THE CONSTITUTION AND LEFT THE MATTER DANGLING.
EVERY pre-War President contributed to the Civil War's coming...and yet I don't see you levying blame against Washington or Jefferson or Madison or, hell, even James "The Nation Blew Up On My Watch" Buchanan...
Blame them all or blame none if you're going to go the "contribute to the Civil War" route, your current argument reeks of cherry-picking.
"But all of that is ignored simply because Polk got California."
No...it's not ignored...
I simply don't feel the need to
1. Condemn a man for making a mistake most leaders of his era made, and
2. Apologizing and feeling self-loathing for land and territory I enjoy thanks to that War, just or not...it's 150+ years in the past, you see...the same way I don't hate every last German to this day because of what the Nazis did to my people 65 years ago or so, I don't feel the need to dig up old wounds here.
What was done was done, right or wrong, for better or worse it was the way things were done in that age, and Polk was just another man, not a stand-out evil mastermind.
Give the past a rest, for God's sake...at some point, Putin, you HAVE to let it go...
If more folks DID let the past go, rather than acting on old blood feuds and historical grievances as you're digging up and laying unfairly squarly on one man, we'd have less war in:
Ireland...
The Gaza Strip...
The Middle East...
Africa...
East Asia...
Northern India...
For starters, anyway.