I don't get why you are torn? The government has not told them they cannot collectively bargain, they simply said that as an employer they will not hire or employ people who engage in collective bargaining, moreover all they have said is that they will not entertain or allow collective bargaining to determine certain aspects of their employment.. As an employer WI can make any terms it wants, and as a laborer or employee workers may or may not accept those terms and find employment elsewhere.
You do not have the right to force your will on others, employers offer pay and benefits to attract workers, workers offer services in return, both sides must agree to the exchange. Yet here you argue that the workers have the right to force terms on the employer, would you also support the reverse where employees were forced to labor(meaning they cannot quit) under certain terms that were forced upon them?
It is an exchange, WI offers money which represents the entire spectrum of goods and services in exchange for the services the workers will provide. You cannot use force on either side of the equation in the free market.