Yes, this is what I mean. Should the US sacrifice the security of Europe to make a (pointless) statement about Syrian internal politics? Frankly, it's unreasonable for Turkey to not have an opinion about the PKK. If there was a comparable terror group in Mexico, the US would absolutely be doing airstrikes!
Punishing Turkey over this will accomplish nothing and sabotage the relationship. The US already had a reasonable plan in Syria, supporting the non-PKK elements while maneuvering towards a political reunification.
Or when they support islamists in Syria against the kurds and annect illegally parts of it. Who cares about those things nowdays anyway.
But if we want NATO to not just be a military force, but something something freedom and human rights, maybe we should care more about it.