The Federation-Klingon alliance stretches belief when Picard can just make a call (to whom, Rent-a-Klingon?) and have three BOPs secretly follow him to the Neutral Zone. Then they stay completely hidden even as Warbirds descend on the Enterpise. They only appear only when Picard signals them to, and they never fire a shot.
For a race that hates Romulans so much, what if the Klingons had decided to open fire on their own?