One of my hatchling males was just like that when I got him, strikes at everything. One time when I was cleaning his tub I put him back in on the far side of it and he actually crawled all the way to the close end just to bite me.

I've been working with him slowly though, and over a month later we kind of had a break though the other day: I handled him for about 10 minutes without him either biting me or striking at anything period. I just basically set him on my lap until he calmed down before moving him at all and it seems to help.

I think hatchlings are a lot more prone to be defensive though, as they get older they just don't care as much it seems.