people outside the USA should obviously feel like they have an interest in US politics given how much we unnecessarily involve ourselves in the affairs of the entire world, and to be fair, how linked our consumption policies are to the rest of the world. that said, i'd just remind people who do not live here and have never lived here that its hard to understand the issues that people deal with on a daily basis that are impacted or potentially impacted by the election if youve never actually lived here, and if you are going to judge people's political beliefs, you should at least make sure you understand the issues they are concerned about.
i could comment on UK politics with a 30,000 foot view, but it would be pretty meaningless. ive visited the UK 4 or 5 times, never for more than 4 days, and ive never lived there, so its hard for me to speak meaningfully about issues impacting people in london or portsmouth or whatever. the situation in the US right now feels like a bomb about to explode, and the shrapnel is going to hit everyone, so its understandable that everyone is worried/has a take on it.