because the people in front of you are standing then it is fair that you then stand to see.
I would have gotten a usher to see if there were some seats they could have moved them too where they are able to see.
I understand them wanting to go to the game and experience the atmosphere but at the same time, they can't expect you and everyone else to not be able to stand and cheer when that is what the team needs and will help the team in the long run.