Squirrels are not known for nest raiding and hatchling stealing....but boy, that sure doesn't mean they don't do just that! They aren't just cute little bushy tails eating nuts and corn!
This little community I live in didn't have squirrels. Not one. But about 6 years ago some guy who moved here from parts unknown decided he missed them, and he went somewhere and trapped 20 of them, then turned them loose in town. Brilliant! Now the little boogers are everywhere! They get under my house and pull out insulation for their nests, my fruit trees have been decimated, and putting out my bird feeders is an exercise in futility! And having seen exactly what @KathieMc mentioned for myself, I hate them with a passion that borders on insanity!!! I wouldn't put chick stealing past them!