If Cisco has problems, that should also be dealt with.
But because Cisco has problems doesn't mean that Huawei shouldn't be dealt with.
In Western cultures, we have the notion of "Two wrongs don't make a right."
This is a classic Chinese government talking point. "Don't look at what we're doing. Look over there, instead!"
For decades it's been using the same tactic when anyone criticizes China for trade imbalances and human rights abuses. It's really boring and base at this point.