Much truth here, but on the other hand it raises the issue of just what it means to worship. Since we don't put a football team on a literal altar in a literal temple and literally kneel before them there is arguably a case that we are not worshiping them. But if we have put them on a pedestal in our lives such that they are the most important thing to us, or that they come before God in our lives, is there really any difference in what is in our hearts? It's clearly absurd to say that someone who skips church one Sunday to watch their team play is putting them above God (although I'm sure some would make that claim). But if someone can find the money to pay for a season ticket, if they can find the time to attend endless football games, if they can find the mental inclination to know the players and their styles, the team statistics etc, and yet at the same time they can't find the money to contribute to the needy or to the church, they can't find the time to follow the calling of Christ and they can't find the mental inclination to spend time in prayer and reading the Bible, one might question their priorities. From there it is arguably academic whether the specific word "idolatry" is used, and even if something isn't literally placed into a full-blown religious structure (some would say football is practically a religion to some but perhaps that's a rabbit trail) it can still take the place that should be reserved for God. On your last paragraph I'd just suggest that Antichrist is not necessarily some political leader. The false Christ proclaimed by a false religion could conceivably also be a political leader.