They haven't presented any evidence that the terrorist were founded with Bitcoin, but I think they didn't really claim it, they just speculated with the idea, just to get some clickbait headlines for their website and whatnot. It's a business after all.
they had a clear purpose to scare people n associate this fear with bitcoin
of course they had no evidence, and they wouldn't even be able to
hypothetically explain how it could be used as a funding source
the real war is being found against crypto and terror is the
weapon of choice, but that gives us a gigantic psychological
boost against fiat users, who just get free sht all day n turn
into lazy pricks with a short temper and little to back it up except
a mountain of debt