Most don't even know anything about these teams since people mainly only know the big four leagues. Celtic and Rangers are an exception because they are very famous for always winning the Scottish League.
Famous yes. Good enough to win in Europa League ? I doubt it. I mean Celtics some years ago could have been a team who fought side by side with big teams but when it comes to Rangers, they are not good in Europa League or UCL and they still have a long road of hard training to get there.
Last night Porto was robbed in my opinion of 2 penalties and I think the referee should be suspended for next games. Regarding PSG - Bayern , I think I already know how is going to play in the finals : PSG - REAL MADRID with PSG winner.