Wiktionary
delegitimize
vb. 1 To make something less legitimate. 2 To make something illegal that was previously legal.
Usage examples of "delegitimize".
Liberals invented the myth of McCarthyism to delegitimize impertinent questions about their own patriotism.
The Haredi community is at the forefront of the fight to delegitimize Reform and Conservative Judaism, just because they offer a less stringent interpretation of Torah.
Begin was ready to indulge messianic Jewish settlers and ultra-Orthodox rabbis who wanted to use the Israeli parliament to delegitimize the Reform and Conservative branches of Judaism.