I do. Manafort was out on bail. He knew what he was allowed to do and what he wasn't, and he chose to do what he wasn't supposed to. So no, I have no problem with Manafort spending his pre-trial time in jail.
Manafort is a crook. What he is being charged with are actions unrelated to the campaign and he deserves to face trial for them. If Mueller's goal is to get Manafort to implicate the President in any illegal actions then there is no way he can do that without perjuring himself. And get charged with that, too.
Save your BS for someone else. Manaford is being persecuted for no other reasons then he supported Trump and mueller wants to squeeze him to implicate Trump, pure and simple. The truth no longer matters.