Understood if-clause in the past?

Hi. I think we could use a sentence form in the present that has no if-clause but is understood to have one. (I think we could.) As for the sentence underlined, I believe the context is in the past. Could we understand as it having an if-clause eventhough it is not there in the sentence?

He was handicapped, meaning he couldn't move about like normal people. There was a long line to get free tickets, with some people pushing others. In his physical state, that would have been enough to cause him to give up.