As RRR says it was about the colours of the ribbons put on the cup after the match. So it "made sense" as an anti-semitic statement because he's conflating Spurs (who are known for having a big Jewish following) with the country of Israel. As if a loss for Spurs was a loss for Israel.
It was a stupid tweet and in any case he deserves all he gets for congratulating that shower of shite!