US Missiles Fired at Russia | Dangerous Escalation Ukraine War

Joe Biden has permitted Ukraine to use US ATACMS long range missiles and fire them towards Russia. The reason given it the claim that Russia has deployed North Korean troops in the Kursk region.
But is this the real reason?

References:
The New York Times
https://www.nytimes.com/2024/11/17/us/politics/biden-ukraine-russia-atacms-missiles.html

CNN
https://www.msn.com/en-us/news/world/biden-s-green-light-for-ukraine-to-use-atacms-just-raised-the-stakes-in-a-war-trump-will-inherit/ar-AA1ufk7u

TIME
https://time.com/6695261/ukraine-forever-war-danger/

Politico
https://www.politico.eu/article/why-ukraine-losing-russia-war/

The Conversation
https://theconversation.com/ukraine-cannot-defeat-russia-the-best-the-west-can-do-is-help-kyiv-plan-for-a-secure-post-war-future-242010

The Telegraph
https://www.telegraph.co.uk/world-news/2024/11/18/us-long-range-missiles-inside-russia-help-ukraine-kursk/?msockid=161bfb4f56fa6bb4283fee7c57886abc

Jacobin
https://jacobin.com/2023/01/ukraine-postwar-reconstruction-western-capital-blackrock-neoliberalism

The American Conservative
https://www.theamericanconservative.com/the-military-industrial-complexs-big-break-in-ukraine/

Fox News
https://www.foxnews.com/politics/trump-describes-how-he-could-solve-russia-ukraine-conflict-24-hours