Rav Bromer of Sanik said in the name of the Mahari of Belz that while in previous generations there was a custom among Chassidim to disparage and distance themselves from anyone whose Torah study was not leshem Shomayim, that was the case only when in the past the study of secular subjects was generally foreign, ignored and not widespread. Today, however, when secular subjects are widely studied and Torah study has diminished, we should draw close any ben Torah from any background, even those who do not yet study leshem Shomayim, in order to distance the masses from secular studies and discourage their dissemination. (Etz Chaim, Gilyon 11, p. 219)
(See also below a story Rav Yehoshua used to say about the Taz, and the story of Rav ...)