Voting Liberty Held Hostage by the Virginia Republican Party?

Should the Republican Party require those voting in the Republican Primary to sign

a loyalty pledge that says they will vote for the eventual nominee in the General Election?

Or is it against one's liberty for the Party to force them to sign a pledge

that would force them to vote for a person who against their values?

Even top Virginia Republicans want this rescinded:

McDonnell, Bolling want 'loyalty oath' rescinded