Indeed, they didn't: https://en.wikipedia.org/wiki/Operation_Cyclone

"Operation Cyclone was one of the longest and most expensive covert CIA operations ever undertaken.[2] Funding [..] rose to $630 million per year in 1987,[1][4][5] described as the "biggest bequest to any Third World insurgency".

What happened next was a logical consequence.

Would you excuse Hitler with the same sentence? You can switch islam with white supremacy, it's a similar supremacist ideology in search of a boogeyman. Protocol of Zion is still cited as a legitimate source in the middle east.

And yet nobody's invading US to get rid of white supremacists.