If I cast aether snap and my opponent has Wayfaring Temple together with other creatures on the battlefield, does it die because the counters are removed or the other creatures still give him counters and he lives?
You seem to have it got wrong: Aether Snap removes nothing from Wayfaring Temple, because Temple does NOT have counters on it!
Temple gets its power and toughness by counting creatures, NOT from the benefit of (nonexisting) counters.
Aether Snap does exile tokens, however, which may reduce your creature count, which would reduce Wayfaring Temple's P/T.
Still, as long as Temple is alive, it's a 1/1, because you DO have one creature: Temple itself.
Temple gets its power and toughness by counting creatures, NOT from the benefit of (nonexisting) counters.
Aether Snap does exile tokens, however, which may reduce your creature count, which would reduce Wayfaring Temple's P/T.
Still, as long as Temple is alive, it's a 1/1, because you DO have one creature: Temple itself.
RULES OF MAGIC :
http://magic.wizards.com/en/game-info/gameplay/rules-and-formats/rules