Kilmarnock once again proved a thorn in Celtic's side as David Watson headed a stoppage-time equaliser at Parkhead to deal a major blow to the Hoops’ title hopes.A first-half header from Kyogo Furuhashi looked like being just enough to send Celtic three points ahead of Rangers in the cinch Premiership title race.But Watson headed into the corner of the net from fellow substitute Fraser Murray’s cross after Alexandro Bernabei had misjudged the flight of the ball.The 1-1 draw gives Rangers the chance to move two points clear at the top of the table when they face St Johnstone in Perth on Sunday, having already clawed back a seven-point deficit since Philippe Clement took over eight games into the season.Kilmarnock had already beaten their hosts twice at Rugby Park this season – once in the Viaplay Cup – and their late goal came from one of 12 shots at goal.Joe Hart twice saved well from Liam Donnelly and Killie manager Derek McInnes was frustrated his side did not get a penalty for Stephen Welsh’s sliding challenge on Marley Watkins.Neither referee John Beaton nor video assistant Willie Collum were convinced by Watkins’ appeals but it looked a risky challenge.Celtic had left-back Greg Taylor back from a calf injury while Israel international Liel Abada was still absent after it was decided he was not in the right frame of mind to play following talks with manager Brendan Rodgers.The game started amid a vocal tribute to the Palestinian people from the Celtic support, some of whom held up banners stating "30,000+ dead, 12,000+ children, end the genocide, end Zionism".On the park, Watkins saw a header saved from an early chance.Adam Idah was showing some good touches up front for Celtic and one flick paved the way for Callum