I'm pretty sure it won't. This act replaced the older war act on the books and we can look at history that includes governments on both sides to see evidence of its use.

I don't see a problem.

A democracy needs tools to protect itself from elements that wish to destroy it. This is one of those tools. Someone looking to overthrow democracy isn't going to not do it because they don't have this tool. We have plenty of historical examples.

Those that wish to destroy democracy don't get to whine about the tools that prevent them from destroying it. They get to be at the receiving end of these measures. The theoretical possibility of those people ever getting to use those tools for their purpose, we'll cross that bridge when we get there, hopefully never.