You can legally express that point of view by saying you don't believe the official story. If that's all Alex had done, he wouldn't be in the trouble he's in. You could make your point of view more credible by proving elements of the 'official story' false.
But the minute you come up with your own story, you are more exposed. Because if your story is proven to be false, and you maligned others falsely in the telling of it, you can be on the hook. That's what Alex did. And that's essentially what the MSM media did to Nick Sandmann. The main differences are the MSM lied about fewer people in that case, and did not hang onto the lie as long as Alex Jones did. They realized they were in trouble and they took steps.
'Proof' may be in the eye of the beholder. That's what juries are for. But truth and lies are not in the eye of the beholder. It's either a truth or a lie. The truth may or may not be provable. The lie may or may not be provable. But that does not make them any less true or false.