R’ Goren, R’ Unterman, R’ Uziel, R’ Kalischer, and so many others saw a clear inyan of zera yisrael requiring a lenient giyur standard. This is one reason why I support Rav Amsalem and his party.
Conversion can and should be a tool by which Jewish unit can be cemented. The above felt this way because they were in touch with the needs of Israeli society.
Turning away little Marc Friedman because his mother isn’t Jewish won’t do klal yisrael any favors.