But even American companies have offices abroad especially as they get big (not OpenAI yet but if they get big enough surely). Eg deepmind is based in the UK. Is it surprising to you that people from other countries might be wary of strengthening the US military at all costs?

Also, we know that the US military frequently uses its powers to maintain its global hegemony and the influence of US corporations abroad. This can be beneficial (more stable world order with fewer conflicts) but can be harmful (if the US decides to overthrow your government to protect its interests or the interests of the powerful within the US, bye bye)