Yes you are. It's a well known fact that besides dissidents and abuse victims also criminals use Tor. So yes, running a Tor node means you're intentionally concealing activity, including illegal activity. Claiming you don't know that is just not believable. It just means you think the end justifies the means. And as with every opinion, everybody is entitled to their own, even if it conflicts with yours.
By the same logic, doing anything that encourages anonymity (wearing a hoodie, using public terminals, taking public transportation instead of something that requires a photo ID, etc.) is equally "intentionally concealing [illegal] activity".
The Tao is like a glob pattern: used but never used up. It is like the extern void: filled with infinite possibilities.