The Fugitive Slave Act did as much as anything to generate opposition to slavery in the North. Among other things, it stacked the deck against black people, whether slaves or not, by denying jury trials, paying judges a higher fee for findings in favor of slave owners, creating dodgy affidavit requirements, refusing to hear testimony from the person in custody, and authorizing the payment of bounties.
The Texas abortion vigilante legislation resembles the FSA in several respects, and is about as pernicious. Will it suffer the same fate in the long run? One hopes so.