My vote is for the candidate whose box I check at the ballot box. If you're so worried that your candidate will lose that you start blaming other people for your candidate losing, its time to admit your party chose a poor candidate. Your party is not entitled to my vote. If you want it, your candidate is going to have to earn it. Trump has done a horrible job at that.
When you see Trump and Hillary as the same person, a vote for Johnson is the only vote against Trump. Its also the only vote against Hillary. The logic that a-vote-for-Johnson-is-a-vote-for-[insert the person you're most afraid of] is completely invalid.