You’re probably gonna make it worse for everyone. It’s probably more profitable to have more security around the infrastructure than to just abandon it, so that’s more expensive. You’re gonna make it more difficult to convince people to actually believe in climate change and legislation that helps the cause, since the climate movement is associated with terrorism.
Just vote for the candidates that actually care about the climate and invest in preserving it. You can also help a little bit by using things that have a very low carbon footprint over its lifetime, like an electric car or using public transportation. These things are just off the top of my head but terrorism ain’t it.