It's unfortunate that you're struggling to (or perhaps not even trying to?) understand the issues at hand.
- The cartoonist drew them as trained monkeys, being trotted out by their owner.
- Why? Because the cartoonist was implying that Cruz was using his children as campaign props in more than just the standard political manner (having them dress nice, smile, and maybe wave a mini-flag).
- Was the cartoonist correct? Yes, they were. Cruz put his own children in an ad and gave them lines to read, including one where they mock one of his 'opponents'.
1) You can't send your little kids in to do your attacking for you, then claim they're untouchable.
Either the candidate leaves them out of the fray, and other people should do the same.
Or the candidate drags them into the fray...and now they're a part of it.
Ted Cruz is the one who did something unusual and inappropriate first.
The cartoonist is the one who reacted and called him on it.
Not the other way around.
2) The cartoon is not even mocking the children themselves, anyway. The cartoon is mocking
the way Cruz used them for his ad.
The statement being made is not that his children are ugly and physically resemble monkeys. The cartoon's statement is that he taught them to do a 'cute' little performance making political statements that they are far too young/unaware/undeveloped to understand the meaning of - just like an organ grinder teaches his monkeys to do cute little performances.
It's not an attack on the children, it's an attack on Cruz's poor judgement and ethics.