Oh hi guys, I’m new to the site and I’ve had my African grey for about 11 years now and I’ve seen him quite recently regurgitating a lot, he holds onto his legs with his mouth and regurgitates. He regurgitates nearly everything, ( including seeds and vegetables ).
Regurgitation is usually a sign of affection. As for tearing toys apart, that's what they normally do, and isn't a sign of aggression. They love to rip and tear things apart and is good stimulation for them as well as a good way for them to keep their beak worn down.
Welcome to the site!