Jeremy has the majority support of Labour party members, just not the majority of Labour MPs (members of parliament). This is due to the MPs being more centrist (New Labour), while the members in general are more social democratic. I don't think two parties that advocate centrist policies will get elected. Hold to your beliefs, stop trying to make everyone happy. There's an Aesop fable for that. New Labour is much closer to Conservative Party. Conservatives will vote Conservative. Let real Labour shine.