The article noted: one-third of teachers said that they have faced pressure to marginalize the subject, chiefly from parents and students, and that they often do so to avoid conflicts.
These teachers are failing to do their jobs. There is nothing wrong with giving differing views, but the fact that they are marginalizing their teaching of evolution, contrary to their teaching standards is wrong. They have a job to do, and whether they like it or not, it involves teaching evolution. If they don't like it, they can petition for a change in the teaching standards.
To be perfectly blunt, I am a lot more worried that supporting these teachers who deviate from their standards (for political reasons) will only encourage others. Revisionist history or socialist indoctrinations are a lot more significant than the teaching of evolution in a biology class. But both types of deviant teacher behavior have the same root cause: failure to follow the standards set forth by the voters. While we may like teachers who don't teach evolution, it creates a dangerous double standard.
Remember, the ratio of liberals to conservatives as teachers is very high. And liberals will take any excuse to tout their propaganda.
That's why it is important to choose textbooks that allow for creation. Hopefully parents will pay close attention to this issue.