This isn't a matter of searching through thousands of pictures. There is only a sample of one person making the claim here.
You also aven't provided examples anywhere near close. Aside from the hair and likeness, the person claiming to be the older dead soldier has similar facial deformities. A gash between his eyebrows, crooked non-symmeteic nose, dip in upper eyebrow.
The top picture does indeed have extremely similar features. Other than the black wig, look at the mouth. Exact same expression and shape. Same lips. Same cheek dimples. Same nose. The ears look similar. The right eyebrow is arched exactly the same in both pictures.
If you claim that two people looking alike proves they are the same person, then you have to explain your doppelgangers.
If this guy were really a dead solider, DNA evidence would be the way to prove it. No messing around with pointing moles.
It's all very flimsy evidence to decide to spread a hateful conspiracy theory that if wrong, is just causing pain and suffering to the innocent families of those who died. Who would be that callous?