Backpedaling from what you just said makes you seem like a coward.
Going back on what you said like that is very cowardly.
Backpedaling from what you just said ( 適当に今こそ立場を変えようとすること)makes you seem like a coward. ( それこそが卑怯者だよ)
Going back on what you said like that( 今立場を変えて 前と逆のことを言うなんて) is very cowardly. ( とても情けないですよ)