I think the problem that many people, including me, have with your justification is very similar to trumps own televised justification: its vague and selective.
Fact is there are other "worthy" candidate cities to deploy NG to, to counter crime. Additionally, trump is unreliable and generally unfit as a POTUS. Given these two, the concern about trumps tendency to abuse of power, which he demonstrated already, is a very valid response to him mobilizing NG in the most sensitive political region.
You cant calm these concerns with comparably similar crime rates.
Ontop, isnt it an assumption, that NG can actually help with rampand crime? I imagine they project hard force on the streets but do not react to 911 calls.
Also, your budget justification was vague too. The total spending per capita does not allow any clues on relative spending on law enforcement. There must be a reason why its significantly higher and maybe thats why LE falls short too.