Yes, the Republicans are putting their anti-truth bias on public display.

Seeing every issue in black and white is simplistic, and can cause issues. Seeing shades of gray is better. Attempting to avoid bias by seeing only a single shade of gray, as you are suggesting, is obviously not going to be very effective for percieving the world.

Is it bias when informed by observable fact?

It's not a bias if it's just history repeating.

Not even mentioning last names (Steube and Risch)

"Language in a pending 2026 spending bill written by the Republican-led U.S. House of Representatives goes further. It would make both the ACS and the regular 10-year census voluntary, and would also prohibit the agency from reaching out more than once to anyone who doesn’t initially respond."