I think I already have the answer, but I want to make sure we're in agreement. First, the two rules:
Escort: Squadrons you are engaged with cannot attack squadrons without escort unless performing a counter attack.
Snipe: You can attack squadrons at distance 2 with an anti-squadron armament of X blue dice. This attack ignores the Counter keyword.
Originally when I read Snipe, my impression was that Snipe could reach past an Escort squadron and shoot an enemy squadron at distance 2. So long as your target was entirely at distance 2, I thought you could ignore escort. However, upon re-reading Escort, it looks to me that Escort trumps Snipe. If a Snipe squadron is at distance 1 of an Escort squadron, it much shoot at the Escort squadron or another Escort within range. Seems pretty cut and dry (I feel stupid for thinking otherwise initially), but I wanted to make sure I'm reading that right.