Guess I am lucky as I almost never have seen one of these groups at Universal. Yes, a lot at Disney, but not Universal. Then again, I avoid peak seasons for the most part. However, whether any park, I typically do what others have stated and that is ignore them. I either go the opposite direction, or if I really have a place I need to be and they keep to be going that same direction, I just keep heading in that direction and try to separate myself from them as much as possible. Regardless of how they act I just do not do crowds well.
Personally I let the pieces fall where they may for several reasons other than simply having the habit of going with the flow. Reasons being - I do not want a scene to be created / escalated, not wanting to create misunderstandings / frustrations on either side, and seems fruitless as a lot of guests regardless of language barriers, seem to want their way. The last one is a big one. I do not know how many times I've seen actual TMs have to repeatedly tell guests certain things and they act oblivious and keep doing it, or keep talking to a TM in order to attempt to get something they can't have, or do something they're not allowed to do. I already do that a lot on my own job. I do not need to deal with it here as well.
That being said, if something you feel is needed to be done, tell a TM. That is personally my advice to anyone. It may not be a long lasting solution, however it is best to not deal with a confrontation personally and that way it's from a person of authority. That way a TM can notify them to follow certain protocol afterward (if they do not get them during the act), inform them on what they should do in the future, and if there is a language barrier might be able to find someone better to communicate. It may not work for next time, but it's the best solution in that moment.
To me, it seems poor timing and we all weren't there. It sounds like two approach roughly at the same time. OP has themselves and four families behind them, the group leader has a bunch of members in their party as well. So, either way, one would have to wait on the other. While there is a debate what is appropriate and inappropriate I honestly feel as if the group leader was making sure everyone got in line and stuck together and there was a language barrier on top of it. It could be entitlement, sure, as a lot of people can fit into that category, but all in all, I just think they were making sure they got onto the ride (which a lot of people feel it's every man for themselves when they try to get onto ride while others trying to as well), making sure people stuck together, and didn't understand what the OP was saying.