I have an experiment for you, pour e.g. a 0.5L Erdinger Weißen upside down and observe the resulting mess, then do the same with the 0.5% version of the same beer.
There's much less foam in low alcohol beers, so it's not just the alcohol content (unless that affect it directly in some way I don't know about).
There's much less foam in low alcohol beers, so it's not just the alcohol content (unless that affect it directly in some way I don't know about).