I’m a known Trump supporter. I’m also one who has supported 3rd party candidates in the past. I believe a person’s vote is for the candidate they cast it for. One can argue over mathematical implications, but a vote based on principles is an honorable thing and should not be impugned. Instead, we should win people over. No way I believe Cruz supporters support Clinton.
It’s not that they politically support Hilliary, it is that they want to stop Trump and the majority of republican voters. If they end up stopping Trump they have given Clinton the Presidency. Cruz has zero chance of winning either the nomination or election and that doesn’t matter to them, so saying they support Hilliary is true in that sense.