If it were a matter of principle they wouldn’t sell so much Chinese crap in their store and would seek out and encourage American companies to do business with them.
They are playing within the trade rules set up by government. If they don't sell the Chinese crap, someone else will and will undercut them on price eventually driving them out of business. If it were a matter of principle they would be arguing for the government to raise import tariffs, to help American manufacturers. But don't expect them to unilaterally try to overturn international trade policy.
Oh great, it’s not enough that we have a real 25% unemployment rate here in the US, now you want to put millions and millions of 6-8 yr olds in China out of work also./s