が / も～なら、～も～だ

The structure AがBなら、CもDだ (or AもBなら、CもDだ) is used to criticize or negatively evaluate both A and C by saying that if one is bad, the other is equally bad. It draws a parallel between two related things (often a pair such as parent and child, teacher and student, husband and wife) to emphasize that both sides share the same negative quality.

The literal sense is "If A is [bad in some way], then C is also [bad in some way]" – implying that neither is any better than the other.

Key nuances

• This pattern almost always carries a negative connotation. It is used to express criticism, exasperation, or disapproval of both parties.
• The two items compared (A and C) are typically related or in a natural pair: parent/child, teacher/student, boss/subordinate, etc.
• Both が and も can appear before the first なら. Using も in both clauses (ああるAもbBなら、cCもdDだ) further emphasizes that both are equally at fault.
• The second clause ends with も〜～だ, reinforcing the idea that the second party is just as deserving of criticism.

Comparison with similar patterns

This should not be confused with a simple conditional using なら. Here, なら does not express a true "if" condition but rather sets up a rhetorical parallel: "Speaking of A being X, C is also Y."