They're dinosaurs. A not too many of them. Giant dinosaurs. Not little bugs. The military would easily kill them off within weeks. The core of the story is that... oooh man has brought back dinosaurs and now we can't stop them. But we easily could. There are MUCH bigger problems in our world right now than a bunch of giant animals and some predators getting out in the world. We lived out tigers... They're sneaky motherfuckers. What the hell is T-rex gonna do?
Other things that don't work
The military could give two shits about having a smart rex as weapon. They already have MUCH more efficient weapons... Not to mention warfare today is different than what it once was. This is not 1944.
Serious environmentalists would NOT form a huge movement to protect Frankrenstein creatures from dying out of a natural cause like a volcano eruption.