You’ve presumably got to be a bit of a prick to think that people wanting social justice is a bad thing?
I don't think anyone has a problem with the idea/concept of Social Justice.
The issues are around the arguments of it's definition, metrics used to identifiy a social injustice and the solutions proposed etc.
If you take the issue of diversity; how do you judge if you have enough diversity or not? What metrics should be used?
For instance, if the breakdown of an engineering company's employees didn't match the breakdown of the society (in percentage terms of gender, race, ethnicity etc) could you consider this a social injustice?
A SJW type would probably consider it is, and have no problem proposing socially engineering a solution so the breakdowns match.
A liberal/libertarian type would probably look at the situation differently. They believe that everyone is an individual and if allowed to make free choices then it's very unlikely that the make-up of a company would reflect that of society.
(This is born out if you look to the Scandanavian countries; they are considered the most liberal, and where woman have the greatest choice & opportunity to choose their profession. The percentage of women in the STEM fields or areas of employment is less than other countries like the UK. Simply put, when given the choice women prefer not to work in the STEM professions and choose other areas).
Their view would be that if you try to engineer people into a pre-conceived outcome you would actually have to remove some people's freedom of choice.
Therefore their focus would be on ensuring that everyone who wants to has a fair chance of joining that company.
Many of the issues come down to if you believe in 'equality of outcome' over 'equality of opportunity', or should society be based on a meritocracy etc
And then you can complicate it even further by throwing the concepts of 'collectivism' vs 'individualism' into the mix with regards to solutions etc
Should the individual be subordinate to group, or should the rights & interests of the individual be prevalent?
Some issues of collectivism is that when you form groups you produce hierachies, and the SJW types have a concept that the place of group in the hierachy should be based on the perceived oppression a group receives.
The flip side is that people believe it should be the individual that has the rights, not a group.
A lot depends on where your views fall on the political spectrum/compass; libertarian/authoritarian & left/right etc