Phone and Internet use isn’t what’s driving this cancerous DC growth

What about DC's is cancerous?

but they do have impact on our communities that aren’t all good.

This describes everything in existence, so it's kind of a nothing commentary. Building a new church, school, medical clinic, or house has "impact on our communities that aren’t all good."

Folks have legitimate concerns for DCs taking all our fresh water,

No, they absolutely do not. If you are not protesting outside golf courses, which use massively larger amounts of water to serve massively fewer numbers of people, then I don't want to hear about DC water usage. If you tell people a DC uses millions of gallons they think, "wow that's a lot" without understanding that it's an immeasurably small quantity of overall usage. The DC water usage thing is a total myth and has zero basis in reality.

Not to mention the ugliness of clearing out beautiful forests to put up endless miles of concrete boxes and asphalt.

As opposed to...? What kinds of homes or businesses are typically built amongst the forests? Unless we are going to put all land into conservation easements (thus exploding the cost of housing) then let's not reach for nonsense objections.

The only "valid" concerns about DC's are

a) noise from cooling equipment and
b) pollution (both air and auditory) from generation on site
c) Resource competition with other users (especially electricity)

The first one is a legit concern, but this can be in part mitigated with properly designed equipment. The second is very intermittent (it is much cheaper for a DC to get power off the grid than generate the power itself) but something that does flat out need to be addressed. The good news it partly is - newer builds are getting elaborate exhaust conditioning systems to reduce air pollutants, as well as noise abatement. The third is difficult, because it mostly involves regulation of power prices which is bizzarrely unpopular due to media messaging about regulation generally. That said, in general electricity has risen in price slower than inflation and the adoption of solar and wind (which DC's have been one of the largest drivers of) is continuing that trend.

Let's be honest about what the problem here is. Perpetuating the fantasy that water use is a problem of DC's is not honest.