That we don't need the Constitution of the United States anymore

When we confuse Nationalism with Patriotism

When we forget what it truly is to be an American

Absolute belief in a deity whose holy books can be interpreted to justify violence without question.

Socialism

Division

Lately, most everything is so called [b][u]weaponized[/u][/b] and targeted at someone, ideas included.

DEI

The MAGAs

Liberalism. Assuming the world owes you because you exist.

The idea that the worth of someone’s life can be measured by the amount of wealth they possess. 😞

Nationalism

Apparently equality is. 🤷🏼‍♀️

"I won't vote anymore, because it doesn't matter anyways"

"All options are just as bad"

Plenty of modern issues, many of which have been enumerated in the other comments, were only possible after this sort of thinking was normalized.

marxist ideas.

Any idea could potentially be dangerous to society if it's carried too far. Generally, I think extremism of any sort is likely the most dangerous.

Most anything out of the WEF

Any

Organised religon. That covers most of it..Any set of rules that demands conformity of behaviour that has no direct bearing on harm to others is bad..😷

From a UK perspective, ANYTHING out of the mouths of Pritti Patel; Suella Braverman or Michael Gove.

Banning social media (TikTok Banned)

Censorship

(Just look up WW2 for them reasons)

Any belief, whether it's religion, politics or whatever, that gives you carte blanc to achieve your aims

Individualism is killing the planet right now. So we meant anything BUT that......
Hot pants.

If double-standards weren't normalized it'd solve most of the worlds problems I think.

There's many both ways depending on whatever motive is in their minds.

you ask good questions overall--will loop back to this

Nuke clear weapons being made to enialate America

Realising we are in chain!

That the worst issue in society at the moment is anything but the struggle for anyone to survive and live in a home and meet their basic life needs. Broken homes make broken people make broken people in power, breaking others.

String Theory

People following satanist religion rather Gods religion

That unfettered procreation on a planet of finite resources should be some sort human right (as well as the idea that Acme Corp should be able to go set up outposts / mines / etc. on any other celestial body in space once humans have exhausted Earth)

That federalism is a good idea instead of a unitary state

That Everyman / Everywoman should be able to run for political offices with very few restrictions (such as an IQ test, and actual experience in public administration, law, or STEM)

That morons (e.g., people who believe in things like consiracy theories or subscribe to beliefs such as climate change denial or "sovereign citizen" nonsense) should have a right to vote just like non-morons

That extreme wealth inequaliies and a plutocrat / oligarch class are acceptable (and that this class thereafter shall be free to use its wealth to continuously advance its own self-serving political agendas at the expense of the majority of citizens)

fairness

Religion and politics