Conservatives are rightly irked by the fact that the short form for the census seeks to divide people into racial classifications, a la apartheid South Africa. I don’t even know what the long form seeks, but I’m sure it’s intrusive.
Nevertheless, please don’t lose sight of the fact that the counting is a Constitutional thing and it affects the number of representatives each state sends to the House. If heavily Republican districts shirk filling out the form, they won’t be counted for purposes of representation in Washington, D.C. That would be a bad thing. We want solid conservative states such as Texas to have a say in federal government proportionate to their numbers.