“The Forever Purge” (**1/2 out of four) was a sporadically effective entry in this blockbuster series set along the Mexican border in which two Mexican immigrants (Ana de la Reguera and Tenoch Huerta) migrate to Texas for a better life; meanwhile, remnants of the New Founding Fathers Of America want the purge reinstated permanently as a means to exterminate anyone who is an immigrant while other landowners (Will Patton, Josh Lucas, Cassidy Freeman) try to help and restore order. “The Purge” becomes topical as it bites off more than it can chew in utilizing its story to focus on politics, immigration, and murder. Final third delivers the goods with some tense action and suspense but on the whole film is overstuffed and overlong- and makes you think what directors Sam Peckinpah and Walter Hill might have been able to do with this material. Might be time to call an end to this series before it starts to feel like it’s going on “forever.”