They got involved in the 2000 presidential election and overruled Florida's supreme court and effectively decided the election.
Bush v. Gore was a particular set of circumstances into which the U.S. Supreme Court trapped itself with a 5-4 vote to issue a stay and hear the case. Realizing the trap into which they had voluntarily stepped, the decision contained language that implied there was no future precedent being established—"Our consideration is limited to the present circumstances". After she retired, Justice O'Connor expressed doubts and regret over the Court's decision to hear the case. Bush v. Gore is not a mistake that anyone concerned with the reputation and public confidence in the Supreme Court is looking to repeat.
What I'm saying is they're going to stay out of it this time even if there are constitutional grounds for them to be involved.
There are no "constitutional grounds for them to be involved". The Texas case is frivolous and poorly reasoned gibberish.
Chief Justice Roberts is a very cautious man who wants to keep the court out of politics.
Matters which are assigned by the Constitution to the political branches to decide are not appropriate for federal court intervention beyond perfunctory initial hearings to allow oral arguments to be heard. If not rejected before an initial hearing, they are routinely dismissed as nonjusticiable due to lack of standing or as political questions outside of the jurisdiction of the court, or both. Exceptions are quite rare.
He's also afraid of "packing". So he'll keep the court out of it.
Opposed... likely. Afraid... doubtful. The Court will not intervene for the previously stated reasons.