An opposition win may be on the cards for a closely watched by-election in Malaysia’s southernmost state, with analysts predicting a return to form for the recently ousted Barisan Nasional coalition as ethno-religious dog-whistling goes into overdrive a day before polling.The Malaysian Chinese Association (MCA), which was decimated in national polls last year when it managed to hold on to only one of 222 parliamentary seats, is tipped to clinch Tanjung Piai in Johor when voters head to the…