They haven't been indicted for kidnapping because it's the government itself doing it with federally deputized agents. What, is Trump's DOJ going to prosecute its own law enforcement agents for executing Trump's policy? No, that's utterly laughable.
Additionally, Obama's use of ICE was far different from what's going on today in that Obama used targeted enforcement prioritizing criminals. ICE today in Minneapolis is just driving around grabbing anyone they think could, possibly, maybe be illegal. US citizens are being swept up by anonymous, violent and poorly trained agents with virtually no accountability. It's causing terror in the community in a way Obama never even came close to. To suggest these are similar is extremely disingenuous.