I assume you don't think the IRA were terrorists?
That you'd classify their actions during the troubles as somhow justified, on the grounds of 'civil war'?
As it goes, the IRA has more claim to this dubious justification then FARC. Saying that, it may be that 'Organised Criminals' is a better name for FARC then terrorists. Most of their action (Such as extortion, trafficking and ransom) seem more like the actions of a profit motivated criminal group rather then a politically motivated terrorist faction.
Nevertheless, there's quite an easy way to cut off their main source of funding. But the US would never brook it.
if it were cut off, it would cut off the funding for the anti-FARC forces as well.
The whole war is a result of the drug trade. without it, the war would end, because both sides would have no money.
re: terrorism
I just don't care to label different groups as terrorists. It a political label and a waste of time. Everyone calls everyone else terrorists... it's just stupid. Terrorism is a tactic, and everyone uses it. The Chechnyans are terrorists, but look at the way they were treated by Russia.