Dude, there actually are Twitter bots every where. I see multiple accounts posting the same exact tweet over and over. You look at their profile and its a obvious its manufactured history. Have you even tried looking?
Technically, Puerto Rico and Guam were already invaded by Spain before it was handed over to the US in 1898. With Texas, I believe it won its war of independence against Mexico and later annexed by the US (1835). If you're going to go back that far they US "invasions" is probably fairly tame compared to other countries of that time period.
I wouldn't say that difference holds for all americans. The trains in northeast corridor, which serve ~50 million people (~15% of us population) also have no-talking cars. But to your point, train service is treated as a basic form of transportation there.