So, let me get this straight: if the US support resistance, the US is causing terrorism, if the US is backing a regime, it's promoting terror, if it's backing regime change, it's causing terrorism... I think you're just mistaking correlation and causation. The US is going to be involved in everything, because the US is the superpower. That doesn't mean that everything that happens is its fault (or, to put it otherwise, that everything would be fine without the US).
There are a number of poor choices in terms of who to support and who to topple.
The Sandinistas in Nicaragua are the prime example. A collection of various social forces topple a far-right fascist dictatorship, replace it with a Republic which started the nation's first free and fair elections 6 years later (which system the US has even praised now and then when someone pro-US gets elected).
Meanwhile, the USA had been the main supporter of said fascists for about 50 years previously, then 100% funded and trained and armed the remnants of the fascist leader's enforcement squads as "freedom fighters" who proceeded to run terror campaigns targeted at civilians. Meanwhile the CIA provided them actual training manuals
describing civilian leadership assassinations, torture and "rule of terror" tactics to undermine the civilian leadership. The CIA was even indicted for planting ship mines in the harbour in an illegal effort to "blockade" the nation, which sunk a number of merchant vessels from European nations. So you have the US administration order
literal terrorist actions designed to scare other nations away from trading with the country America didn't like.
Nicaragua took USA to the International Court Of Justice over all of this, and won the case. But the USA refuses to recognize the legitimacy of the court, making them 100% a rogue terrorist state, except one too big for anyone to stop.