Either you are willingly redefining a word, or you don't even know what it means
Tankie means a person who supports an authoratian communist state.
The word comes from the Tianamen Square Massacre, where tanks were used to silence and kill protester, which some people think didn't happen.
But that wasn't said in your original message, was it? In your original message you were implying that by the USA spending more money in their military to spread their influence, would make the US government a tankie(?), thus invalidating everyone who uses the word tankie.
Also if your point was that the word tankie lost its meaning by usage in invalid contexts, why did you mention the USA? Wouldn't it have been more appropriate to explain that it lost its meaning by the usage of it, and not by the actions of the US government, since the US is not the only nation who has people who use the word tankie?