I think Hitler like Britain and hoped to negotiate a truce with them so he could go after Russia. If he wiped out 400,000 people on the beach, it would have been difficult to make peace. With hindsight, it was a mistake on Hitler’s part, but thank God he made lots of mistakes.
Another mistake was thinking the Italians would take care of North Africa without German assistance.
But England had a very long history of preventing European unification. And good reasons for that policy.
So I think the US public was his primary concern, British feeling a secondary one (and we were the power to fear if the isolationists here didn’t prevail).
Though I’m no scholar on the time.