Law as written, calling them up was legal, and, law as written the governor had no authority to countermand that. Was the civil disturbance real? Not really. Was the behavior of the ICE agents legal, definitely not. But, calling up the national guard just in case there is a civil disturbance is legal. And the president doing so against the will of the governor is also legal, as can be seen with the Little Rock nine in 1957. The governor saying “no don’t actually” would have been ignored by the national guard, and ultimately would have been worse then what happened. The situation didn’t escalate and thus trump didn’t really get what he wanted.
It’s going to keep happening though and something will break at some point. It’s also worth pointing out that newsome is hardly “the left” most of the Democratic Party isn’t “the left”. And they’re going to sleep walk through this national crisis because that’s what’s most convenient to them.