Local people may know that having large corporations fight legal battles in their district benefits the local economy.

State law doesn't matter in a federal court, but the culture of the place the jury is selected and the practice specialties of the local attorneys do. The parent post to yours was talking about Texas broadly, not specifically about Texas state law overriding federal law. That's your assertion, and borders on a straw man.

The state, and especially that part of the state within that federal court district, being generally friendly to one type of party or another has to do with more than state laws. It has to do with public perception, legal specializations in that court district, and more. The juries are selected from that public and local attorneys in a district known for patent trolling will likely specialize in patent trolling cases.