swimming near the boat race
He wasn't out for a swim FFS. He picked a high profile event to ruin and get as much publicity as he could for whatever cause he thought was more important than the concerns of others that day.
Throwing a few eggs at a building is a public nuisance. This was carefully chosen to get him as much airplay as possible and further his own personal goals.
Also on the punishment being out of skew with the crime. HE was the person who has put himself in the situation of being in this country on a visa to be with his family. It would be disproportionate if he was British and we were deporting him, but we're not. He wants to be in this country and part of the visa process is that you have to behave while you're here. If he really wanted to spend his life doing disruptive publicity stunts then do it in your own country and bring the family to you.
It's a bit like turning up at the pearly gates and saying:
"I only stumbled over - why did it end up with me dying, it's so unfair!!!"
"You were the one tightrope walking the Grand Canyon, you muppet"
It's disproportionate because of the choices he's made.