“Teaching children p’sukim by heart” may not be a problem by itself, but it doesn’t stop there, and soon enough, those children become Lubavitchers,
which is suspiciously “me’ein” -ianity-like in its view of the Rebbe being Moshiach.
Why does Lubavitch force itself into frum neighborhoods who have their manhigim & minhogim? Remember the Pesach debacle in Williamsburg in ’80 or ’81? Why come to chasidishe shuls in B.P. on Shavuos to preach their “torah”?
Very noble & very nice to bring Yiddishkeit into “barren’ places, but don’t push your doctorine where it is NOT NEEDED!