Organized labor is important but so is a critical lens towards how we build and leverage it. Unions have numerous and important petty bourgeois contradictions, we can't expect them to do more than they did historically, and that means many may be anti-communist. We should move forward with the understanding that even an anti-communist union has angles by which it can be valuable, that being in a union has some value even if the union itself is not particularly left. In addition, in the imperial core, many unions are tied directly to imperialism and national chauvinism. UAW speaks of outsourcing in chauvinist terms, for example. Various Boeing workers are covered by a union and they build and maintain the planes that do genocide on Palestine. Will they be the natural allies of a socialist workers' movement? Their jobs depend on an alignment with reaction and the bourgeois state, is it even conceivable they could have contradictions built so high that they support any kind of revolution, esp. socialist?

I recommend entering labor from the angle of an organization that wants to achieve a particular longer-term goal via labor. Be in the org first, then do the labor work. Emphasizing a strategy makes a world of difference.