Justification is easy. Damn near no one does anything they don't feel is justified. You may not agree with it, but that doesn't really matter, because the right people will.
A lot of the most evil shit in history was done by people who felt completely justified in doing it.
Normal people have their behavior regulated by family, partners, and work. It's only the ownership class and psychopaths who worry about being reined in by the government. Libertarians have spiders in their brains.
They're just sometimes good justifications (like protecting drinking water supplies) or shitty justifications (like staying in power with Gerrymandering).
Sometimes it's even as weak as "putting forward laws Senator John looks like he's doing something (so he can stay visible and get reelected. Not about power, but just keeping a cushy job)"
Maybe this is just bait, but this is already how it works. I'll go over US law, but other countries likely have similar processes.
Legislation needs to have justification for restricting people, or it gets overturned when challenged. This is because it would fail the strict scrutiny test, making it unconstitutional. It needs to be "narrowly tailored" to a "legitimate government interest" to pass. In other words, it needs to be focussed on addressing a problem the government acknowledges some responsibility to solve, and do so in a way that doesn't cause undue restrictions beyond that goal.
Creating a law isn't an easy process, so they are made with purpose. That doesn't mean every law is a good law, but that's why we have these processes for reform after all. Sometimes you have old nonesense laws remain, but that is typically because they are unenforced or too detached from modern life for anyone to care to remove them.
Tolerance is just an extension of the social contract. Intolerant people are actively violating the social contract and, as such, are not eligible for the benefits such a contract provides. This has been settled law for millennia. Live and let live... or else.
Nah it's not exactly unreasonable to say that all objects and systems can be observed and judged, this isn't libertarian claptrap, it's just a fundamental basis of reality, everybody has a plan including the ones keeping an eye on our very government systems. Think of it this way, almost every system has an achilles heel and can fall apart so having people observe and act quickly to get things "back on track" or simply suggest a potential alternative path away from a point of failure actually means more than simply rejecting critique on the basis of maintaining an imaginary status quo