I think Marxism Today totally missed the point of the movie. How to Blow Up a Pipeline is engaging fun you can share with your liberal friends, that also happens to challenge their notions of acceptable praxis against climate change.
It's a heist film in the Ocean's Eleven tradition, using all the classic tropes like nonlinear narrative, assembling the crew, third act twist - it's unrealistic because it is meant to be entertaining rather than informative. I watched the interview MT clipped from, and they left out the context that they consulted with the counter-terrorism expert so that they wouldn't get into legal trouble for demonstrating actual bomb-making techniques. They collaborated with a government official because wanted their film to have the widest possible release, not to help or hinder people making actual bombs.
I agree that Marxist groups have a hypocritical relationship with 'adventurism' - they only use that term if the cadre's results aren't immediately celebrated by the proletariat. If they succeed and it polls well, they call them the people's vanguard and pretend their plans were stamped at party headquarters. Stalin was a literal heist man, robbing banks for the Bolsheviks. I'm sure the guy who punched Richard Spencer consulted a committee first.
I love the reviews by army-funded Michael Bay film fan types - they all grudgingly admit it's an excellent film, and without any irony say their only demerit is that it's 'propaganda' - that's high praise. If you haven't seen it already, assemble your crew.