Not one single tech person I know in person has ever been "pro immigration" or "anti immigration". They all want reasonable immigration, and part of that has always meant not harming the livelihoods of existing citizens. That's the subjective part.
Edit: This is also a good example of the problem where we assume a person's opinion when they are not loud/explicit about a topic. E.g. a tech person might not have loud opinions on H1Bs, or they might loudly denounce e.g. Trump's immigrant detention centers, and you might falsely then slot that person into a blunt binary like "pro immigration". Then, when their lives are negatively affected by H1B policy, they speak against it, and you then think of them as a hypocrite even though they did nothing hypocritical.